Finding a donor

I'd been looking at the Westfield MX5 SDV for some time but never plucked up courage to do anything about it, and to be honest I hadn't a clue where to start. On a lunchtime surf on eBay I found a 1600cc 1998 damaged insurance Cat B write-off. 62k miles on the clock. Emailed the seller to clarify other than the bodywork, what was damaged, he replied saying the radiator had gone but all the other mechanical parts were okay but the extent of the bodywork damage meant it was a write-off. Starting price was £500, no bidders so far and it had been on for a week.