I agree with 45-70, buy the guns.
Don't know how many guns you are really (100, really?) talking about. Keep the ones you want, sell the rest individually, slowly (meaning when you get tired of them), or sell the rest as a package to an FFL dealer. If you sell to a dealer, expect to get really beat, and I mean BIG time. After all dealers are in the business of making money.
I bought 6 guns from a friend when her Dad passed, with the intention of keeping 2 shotguns, and selling the other 4. Guess what? I ended up keeping all of them. If your like the rest of us, that will probably be what you end up doing. You'll eventually end up giving them to your kids or selling one or two, or maybe trading them for a gun you like better.
BTW I am not encouraging you to do anything illegal, if in doubt check the law.