The only way to give a correct price evaluation is to remove all the games in the center of the storage unit and then you'll have a chance to view all the games in the outer walls. Otherwise the buyer can't see what he is purchasing. Sounds easy, but a lot work if you don't have the proper amount manpower.
The way they are stored now i couldn't pay more than $50 a game ($5100), but If i could view the all the games one by one i could price them more fairly and the seller could end up with a larger offer. Maybe the best way to price this collection for more value is to sell them one by one. For sure it will bring more than $5100. Again a lot a hard labor and time.
I wish the seller the best.