Would you rather have 2 really nice M14 type rifles with all GI parts and barrels of your chose or 3 OK M14 type rifles with some GI parts and luck of the draw repo parts? This is not about who made the rifles just nice rifles with GI or repo parts. What say you. The value would be the same for both lots of rifles.
No matter how nice the two are, you're going to sink more money into them, and/or buy a third rifle.
I'd take the 3 pack, and shift as many USGI parts as I could into one rifle, and keep the other two as "project" guns, or even just a source of parts.
Especially if you're getting a good deal.. after you turn it all around, shift the good stuff into two of your rifles, do a few upgrades, etc - you'll have a left over rifle that you may be able to sell or trade to those of us that don't put a lot of stock in the whole "USGI" thing.