I sold a car through here actually, north of £15k, long-distance, over a bank holiday weekend. It was a bit of a challenge, and I am eternally grateful to the purchaser’s understanding, tolerance and patience, while we worked out how to do this, but the following worked: Small deposit by bank transfer to cover advertising cost (it was also on auto trader) refundable if inspection and test-drive proved unsatisfactory, then photo of banker’s draft emailed over on the Friday. I took photo to local branch of purchaser’s bank to have it verified, then toddled off down the A1 on the Sunday for test-drive/exchange, a cuppa and a train ride home.