I have a NPC Mamiya 7 polaroid back that I don't use for sale.
Its in near perfect condition, there is very minimal sign of use.

The glass/fiber-optics panel is in perfect condition with no scratches, or chips on the glass.
The rollers are nice and clean, no rust or build up.

This also comes with the Mamiya Tripod Adapted N. This allows you to use your Mamiya 7 with the polaroid on a tripod.

Im asking $500 for the lot, but am open to offers. Feel free to shoot me a PM.