Devoted persons must be killed?

[precepts]

Maybe someone with more insight on the Hebraic laws could chime in and enlighten us on the subject.

Num 18:8 And the LORD spake unto Aaron, Behold, I also have given thee the charge of mine heave offerings of all the hallowed things of the children of Israel; unto thee have I given them by reason of the anointing, and to thy sons, by an ordinance for ever.
Num 18:9 This shall be thine of the most holy things, [reserved] from the fire: every oblation of theirs, every meat offering of theirs, and every sin offering of theirs, and every trespass offering of theirs, which they shall render unto me, [shall be] most holy for thee and for thy sons.
Num 18:10 In the most holy [place] shalt thou eat it; every male shall eat it: it shall be holy unto thee.
Num 18:11 And this [is] thine; the heave offering of their gift, with all the wave offerings of the children of Israel: I have given them unto thee, and to thy sons and to thy daughters with thee, by a statute for ever: every one that is clean in thy house shall eat of it.
Num 18:12 All the best of the oil, and all the best of the wine, and of the wheat, the firstfruits of them which they shall offer unto the LORD, them have I given thee.
Num 18:13 [And] whatsoever is first ripe in the land, which they shall bring unto the LORD, shall be thine; every one that is clean in thine house shall eat [of] it.
Num 18:14 Every thing devoted in Israel shall be thine.
Num 18:15 Every thing that openeth the matrix in all flesh, which they bring unto the LORD, [whether it be] of men or beasts, shall be thine: nevertheless the firstborn of man shalt thou surely redeem, and the firstling of unclean beasts shalt thou redeem.
Num 18:16 And those that are to be redeemed from a month old shalt thou redeem, according to thine estimation, for the money of five shekels, after the shekel of the sanctuary, which [is] twenty gerahs.
Num 18:17 But the firstling of a cow, or the firstling of a sheep, or the firstling of a goat, thou shalt not redeem; they [are] holy: thou shalt sprinkle their blood upon the altar, and shalt burn their fat [for] an offering made by fire, for a sweet savour unto the LORD.
Num 18:18 And the flesh of them shall be thine, as the wave breast and as the right shoulder are thine.
Num 18:19 All the heave offerings of the holy things, which the children of Israel offer unto the LORD, have I given thee, and thy sons and thy daughters with thee, by a statute for ever: it [is] a covenant of salt for ever before the LORD unto thee and to thy seed with thee.

Not to be long winded, but I'm trying to show the whole context of the situation, all devoted things belong to the priest. What I'm concentrating on is the "devote things."

Lev 27:1 And the LORD spake unto Moses, saying,
Lev 27:2 Speak unto the children of Israel, and say unto them, When a man shall make a singular vow, the persons [shall be] for the LORD by thy estimation.
Lev 27:3 And thy estimation shall be of the male from twenty years old even unto sixty years old, even thy estimation shall be fifty shekels of silver, after the shekel of the sanctuary.
Lev 27:4 And if it [be] a female, then thy estimation shall be thirty shekels.
Lev 27:5 And if [it be] from five years old even unto twenty years old, then thy estimation shall be of the male twenty shekels, and for the female ten shekels.
Lev 27:6 And if [it be] from a month old even unto five years old, then thy estimation shall be of the male five shekels of silver, and for the female thy estimation [shall be] three shekels of silver.
Lev 27:7 And if [it be] from sixty years old and above; if [it be] a male, then thy estimation shall be fifteen shekels, and for the female ten shekels.
Lev 27:8 But if he be poorer than thy estimation, then he shall present himself before the priest, and the priest shall value him; according to his ability that vowed shall the priest value him.
Lev 27:9 And if [it be] a beast, whereof men bring an offering unto the LORD, all that [any man] giveth of such unto the LORD shall be holy.
Lev 27:10 He shall not alter it, nor change it, a good for a bad, or a bad for a good: and if he shall at all change beast for beast, then it and the exchange thereof shall be holy.
Lev 27:11 And if [it be] any unclean beast, of which they do not offer a sacrifice unto the LORD, then he shall present the beast before the priest:
Lev 27:12 And the priest shall value it, whether it be good or bad: as thou valuest it, [who art] the priest, so shall it be.
Lev 27:13 But if he will at all redeem it, then he shall add a fifth [part] thereof unto thy estimation.
Lev 27:14 And when a man shall sanctify his house [to be] holy unto the LORD, then the priest shall estimate it, whether it be good or bad: as the priest shall estimate it, so shall it stand.
Lev 27:15 And if he that sanctified it will redeem his house, then he shall add the fifth [part] of the money of thy estimation unto it, and it shall be his.
Lev 27:16 And if a man shall sanctify unto the LORD [some part] of a field of his possession, then thy estimation shall be according to the seed thereof: an homer of barley seed [shall be valued] at fifty shekels of silver.
Lev 27:17 If he sanctify his field from the year of jubile, according to thy estimation it shall stand.
Lev 27:18 But if he sanctify his field after the jubile, then the priest shall reckon unto him the money according to the years that remain, even unto the year of the jubile, and it shall be abated from thy estimation.
Lev 27:19 And if he that sanctified the field will in any wise redeem it, then he shall add the fifth [part] of the money of thy estimation unto it, and it shall be assured to him.
Lev 27:20 And if he will not redeem the field, or if he have sold the field to another man, it shall not be redeemed any more.
Lev 27:21 But the field, when it goeth out in the jubile, shall be holy unto the LORD, as a field devoted; the possession thereof shall be the priest's.
Lev 27:22 And if [a man] sanctify unto the LORD a field which he hath bought, which [is] not of the fields of his possession;
Lev 27:23 Then the priest shall reckon unto him the worth of thy estimation, [even] unto the year of the jubile: and he shall give thine estimation in that day, [as] a holy thing unto the LORD.
Lev 27:24 In the year of the jubile the field shall return unto him of whom it was bought, [even] to him to whom the possession of the land [did belong].
Lev 27:25 And all thy estimations shall be according to the shekel of the sanctuary: twenty gerahs shall be the shekel.
Lev 27:26 Only the firstling of the beasts, which should be the LORD'S firstling, no man shall sanctify it; whether [it be] ox, or sheep: it [is] the LORD'S.
Lev 27:27 And if [it be] of an unclean beast, then he shall redeem [it] according to thine estimation, and shall add a fifth [part] of it thereto: or if it be not redeemed, then it shall be sold according to thy estimation.
Lev 27:28 Notwithstanding no devoted thing, that a man shall devote unto the LORD of all that he hath, [both] of man and beast, and of the field of his possession, shall be sold or redeemed: every devoted thing [is] most holy unto the LORD.
Lev 27:29 None devoted, which shall be devoted of men, shall be redeemed; [but] shall surely be put to death.
Lev 27:30 And all the tithe of the land, [whether] of the seed of the land, [or] of the fruit of the tree, [is] the LORD'S: [it is] holy unto the LORD.

First of all, this seems to be a type of bank loan transaction in redeeming what ever has been given to the priest to be redeem, or not, later. The text says no devoted thing can be redeemed. My question is, what separates a devoted thing from a non devoted thing in these exchanges? Is it the status, for example, it being a clean beast vs an unclean beast, etc?

The whole text is confusing since it starts out with a singular vow and ends with devoted things, but If someone can help enlighten, please do! It seems to me the text is saying if you have a servant and need money, the temple being like a bank, you could devote him and get the priest's estimation money while the servant (probably being a slave) has to be put to death being devoted, so it seems?

Num 31:25 And the LORD spake unto Moses, saying,
Num 31:26 Take the sum of the prey that was taken, [both] of man and of beast, thou, and Eleazar the priest, and the chief fathers of the congregation:
Num 31:27 And divide the prey into two parts; between them that took the war upon them, who went out to battle, and between all the congregation:
Num 31:28 And levy a tribute unto the LORD of the men of war which went out to battle: one soul of five hundred, [both] of the persons, and of the beeves, and of the asses, and of the sheep:
Num 31:29 Take [it] of their half, and give it unto Eleazar the priest, [for] an heave offering of the LORD.
Num 31:30 And of the children of Israel's half, thou shalt take one portion of fifty, of the persons, of the beeves, of the asses, and of the flocks, of all manner of beasts, and give them unto the Levites, which keep the charge of the tabernacle of the LORD.

Would these be counted as "devoted things?"

Num 31:21 And Eleazar the priest said unto the men of war which went to the battle, This [is] the ordinance of the law which the LORD commanded Moses;
Num 31:22 Only the gold, and the silver, the brass, the iron, the tin, and the lead,
Num 31:23 Every thing that may abide the fire, ye shall make [it] go through the fire, and it shall be clean: nevertheless it shall be purified with the water of separation: and all that abideth not the fire ye shall make go through the water.
Num 31:24 And ye shall wash your clothes on the seventh day, and ye shall be clean, and afterward ye shall come into the camp.

Isn't this what Paul was talking about in the NT, Moses' baptism, the people passing thru the water?

Isn't this God's winepress?!