I've got a few Phase One digital backs up for sale. These were all used/maintained at our professional photo studio and are in great condition. These are all H-mount backs and come with 2 batteries each, nothing else.
P21: 18MP 16bit
This back has light scratches on the front LCD screen as can be seen in the pics.
Price: $3,800 + shipping
Info: PhaseOne P21
P21 pictures by liquidsk8s - Photobucket
Two P21+: This is also 18MP 16bit but it shoots faster than P21. 1.25fps vs 1fps. The rear LCD also has double the pixels.
Price: $4800 each + shipping
Serial#'s: DV000166, DV000169
P21plus pictures by liquidsk8s - Photobucket
I can ship to anywhere in the world or can do local pickup at our studio in NYC. Canoe Studios * New York City
You can PM me or reach me by phone at 561-901-7713.