iphone 3GS joblot faulty ?

Hi, I have 6 x iphone 3GS 16GB and 1 x 3G 8GB. the faults are below. 3GS 16GB - Powers on - on/off and volume button missing 3GS 16GB - Powers on - Needs connecting to itunes 3GS 16GB - Powers on - Mute button 3GS 16GB - Powers on - connecting to iTunes 3GS 16GB - Powers on - Unknown fault 3GS 8GB - Powers on - Screen 3G 8GB - Powers on - Passcode. Please text/ring on 07824642843. If you buy and sell phones regularly please contact me also. Faults can easily be fixed. once fixed this is easily worth in excess of £750