So I got these brake pads off of eBay (out of Arizona,) has anyone used these before? They were $18 + $10 shipping via priority mail (all four pads.) They are organic, semi-metallic, looks like they have copper in them, and probably tin. The friction material is black, as are the metal backings. I'll report back in a couple of weeks. I'm not too worried about some decreased friction, this might actually make the brakes a little smoother. The stock pads look like an aramid compound (Kevlar) to me, anybody know for sure?