Tough call here. Off the top of my head, I know some of the "monster" games from SPI are worth a fair amount as are some ASL titles. If they're unopened, even better. My wargame collecting is pretty specific, and I try not to go too far out of my price range (ha! like that works). I'm not too familiar with the prices on the companies I don't collect - like SPI or GMT. Are there any
GDW titles in the lot? Your best bet might be to go to
ConsimWorld News — Board Wargames and post a list or request in their Marketplace folder. Someone there will probably be able to help you. However, many people there seem to prefer trading to buying.