62082 $1K plus
FZR $200 plus
62316 $80-90 plus
The rest $40-50 in excellent condition. You can pay more and you can pay less I just gave a rough estimate of actual value. Condition is the key for paying top coins. Un-sharpened never used to excellent used and on down the line. Probably still gonna pay $20 for junk today but if it has a scabbard, you can still interchange the small parts as they only had a couple different cage numbers for parts.
As stated previously just because it says M-7 doesn't mean VN era and most either don't know this or are simply trying to pull a fast one on the unknowing. 62082 and FZR will probably be who has the deepest pockets items in an auction setting unless you happen to know or are friends with an older blade collector or such. The rest of the MFG's will simply be search and find. None of the mass produced surplus pieces are very tough to find. Most the oddball variants are still in the $40-60 range excluding the Milpar 62316 that I seriously doubt you can even find and if you do enter at own risk.
The Hume's book is decent. There were also a few foreign mfg's. Canada, Phillippines, Germany, S Korea, etc. Most just collect the US versions and as with any hobby quickly end up with way too many of this and that if they do it for any length of time. If you have a local Barnes & Noble might be able to enjoy a cup of coffee and broaden knowledge base a bit. I did it the hard way looking at literally 1000's of surplus bayos on my lunch hour, funshows, knife shows etc.
Member WillP had a www site with some well researched M-7 info which I can't remember off the top of my head that is worth giving a look also. If collecting the rare pieces be careful. If condition is too good it's probably not authentic is a good rule unless from a very reliable reputable source. Very popular to take the unmarked Eickhorn blades and engrave FZR and such and pass off as originals to the unknowing. Also the rare pieces in many instances had dedicated scabbards and such.