A older friend who cant use the internet has asked me to check the prices of his camera.

I am not selling it and will not get into any bidding as it is against the Forum policy, I just want your expertise in giving him a rough price thanks .

The Camera is : Mamiya RB 67 Pro-S
Mamiya 250mm F/4.5 & 90mm f/3.5
2x Tele Converter
Prism
2x 120mm backs
1x bigger back (I cant remember)

Thanks Pete