Bought it new recently. Works flawlessly with Soft15kHz, and is a pretty high-powered card, but Advancemame doesn't support it - AND I MUST HAVE ADVANCEMAME - so now I don't need it. It has only a few hours on it. Doesn't require an extra power plug. (Note, this is not the X800 I had troubles with - though that's fixed, horray!)
$40 shipped in the continental US.