I think you're going about it the right way. About $1 each is more than they're getting right now, sitting in a tub. If they sold them at a yard sale they'd be lucky to get that much. And selling the bunch to someone is easier than listing them on ebay- if this person was the sort to sell stuff on ebay, they would already have looked up some of them, most likely.
I'll keep my fingers crossed for you- hopefully it will be a box of awesome!