Having purchased many Leica screwmount bodies over the past ten years from different vendors in the UK, I would contact Malcolm Taylor on 01568 770542. Prices are a bit higher, but you do get a Leica that has no faults and has usually been serviced by Malcolm.
Of all the Leica bodies I've purchased, only two have not had to be sent to Malcolm for repair / servicing or to put into correct working condition. I've had to return Leicas to other vendors for repair (under their guarantee) and in all cases they have not been able to repair the camera, and have either offered a refund or suggested Malcolm Taylor!!
Sorry if this sounds a bit negative, but this is my experience and I post it in the sincere hope that it saves you wasted time and money.