Seems that there is a flood of them on ebay now, with some sellers charging the 'recommended' cost (about $80 for the set of 10), while other sellers are hoping to suck in buyers who don't yet know that the individual heads aren't worth $100+ each, but would be thinking they are getting a good deal compared to the originals.
http://www.seibertron.com/transforme...nd-more/19139/