This P550 back is in excellent condition... The original "leatherette" came off, so I put a label on it. It uses 4x5 pack film (which Fuji still produces). I'm just not shooting much any longer. Asking $130 (includes ConUS shipping & PP fees if used).
I found a pack of Fuji FP-100C45 in my basement & figured I'd include it with this back... I'll test it to make sure it works, so you'll get 9 exposures.