Superb when that happens! Sold a MINT S2 turbo to a lad I knew, I knew I'd made a big mistake.
He rang me up about 2 weeks before Xmas (years ago!) and said he needed money quick and would I buy the car back off him. I nearly snapped his hand off lol. 2 days later the S2 was back where it should of been, in my garage, he hadn't changed the V5 either!
I love stories of people buying their old cars back