Just wanted to let everyone know that there's a pretty good market for these on ebay. I've been saving them from the wheels I scrap out and had 52 lbs. of them saved up. Scrap price would have brought about $14.00 and I ended up getting $32.07 on ebay.
Shipping wasn't bad either, they fit in a medium Priority Flate Rate box for $10.50. The buyer is happy, I'm happy, not sure the post office was though! Just thought I'd throw this out there.