Hey guys. As some of you have hit on, it is going to be difficult to find these in quantity and the group buy mechanic doesn't work very well for this type of product since the price can actually go UP the more of these you want to buy.
Essentially, it is possible to find one of these on the cheap at a garage sale, but anyone sitting on 50+ of these will want close to the going rate for them.
I'm closing this poll, but I won't close my eyes. I'll look for any chances to pick things like this up.