I could only see 2 games that would be worth it to me:
Food Fight and maybe SFII
The rest looked pretty worthless...to me anyway.
And you have to ask yourself: How long did those games have to be sitting there to accumulate THAT much dust on them. wow.
Also, why were a portion of them stored outside it looked like?
Trust me, if you go to this it will be a real shock. The best stuff will somehow already be gone and a zillion nerds will show up with tons a cash buying everything in site like it's some kind of relic.