Question Author
Terambulan
We had thoughht for a while that he wa fobbing us off. However, we didnt say 'if you don't complete by Friday the deals off'', we said that we needed to have some sign that he was serious or else we would begin markting again. Incientally, this guy had told the neighbours (with whom we are very close) that he had pulled out of a sale at the last minute not long ago. His solicitor was extremely surprised at what he had done, his costs would have been tremendous.
However, things probably happen for the best. We wil be more wary with new buyers (by the way, the estate agent had proof he had the money) and luckily we have 2 more viewings this week, so fingers crossed.
Thanks for everyone's comments.