Yep! A VERY rare ADAM only cartridge indeed. As I mentioned in the MarketPlace/Auction thread, I would venture a guess that upwards of 1,000 were produced for Coleco's In-House needs, supplied to repair centers throughout North America and Europe and given to ADAM Users Groups/Mail-Order companies after Coleco's annuncement that they were abandoning the ADAM. Actually, 1,000 copies may be a bit much, but there are no definitive numbers on this one.
Anyhow, the $500 RESERVE was a bit much in my mind, but when you gotta have it... YOU GOTTA HAVE IT and I had to have it. This cartridge is coming home!!!!
You guys did know that ecoleco sold a version of this. I can't tell if it's one of theirs or not.
They also sold one for the superaction controller test cart.