The UR peripheral Intellicart had been sold on eBay for 219 euros
Check http://cgi.ebay.fr/Intellicart-Intellivision_W0QQitemZ8274687527QQcategoryZ14629QQrdZ1QQcmdZViewItem

Actually on eBay: a mint Master Component already reach 200$, the price that collector would pay for a complete console is higher than expected.

The UR Compro Videoplexer is listed since some time for 625$

A copy of Stonix is available: the second copy seen since december 2005.

Huge variations on auctions for the ER River Raid, sold between 20$ and 149$