My Ax60 from Music Go Round just came in tonight! its in great shape, just missing one slider cap (any one know where to replace them?) and one tiny little chip off the bottom of one of the lower keys. completely usuable though. other than that it has pretty minor wear and tear and all voices seem to sound, and all the LEDs work.
spent about an hour and a half just going through the banks and toying with the parameters. this things awesome.
now i need some old akai samplers...
*edit*
pretty clean. you can see the missing slider cap in top left, and the chipped key on bottom left.