He's been on eBay quite a while now, and all his feedback's positive.
He does other models based on Epi VJs and Harley Benton GA5s. The price varies depending on how extensive the mods are - some have a "Power Brake" control rather than Power Scaling, and they don't all have upgraded speakers or transformers. So in effect you can choose the features to suit your pocket. It's quite intriguing.