The aluminum ingots should be able to sell on ebay or to some other scrap buyer online.
I doubt that a regular scrap yard would buy aluminum ingots from just anybody though as it's possible for the person to put other metal in it and unless they have a metal analyzer they may not know what they're getting and might not want to buy it from you.
If you're thinking about melting scrap aluminum down then I would advise against it and just sell your scrap aluminum as is to a scrap yard.