At Botcon 2010 (the official Transformers convention), Bickmore and some Japanese sellers each had tons of these for I about $30 each. Little, if any, takers too.
This year only those same Japanese sellers had about 5 of them, asking $40 each, and I'm pretty sure I saw them unsold at the end of the con too.
Perhaps a TF con isn't the right platform for selling these, but based on those prices, the ones on eBay are quite ridiculous.
I agree, these should be worth no more then $30-$40 each.