I don't know the lineage of this one--if you do, please let me know!*
It has a flat base and 2" of travel. And a smooth Crayford focuser action. Asking $40 + 5 shipping in the US. Will ship worldwide, just e-mail me your address for shipping rate.
Payment at Paypal (including credit cards), cash, check, money order.
*Someone e-mailed me and said it was made/sold by a guy name Crazy Ed. Someone else said it lookes like an assemble JMI kit. I'll g with the Crazy Ed story, only because it sounds like more fun!