so far I have made just under £600 from my mk4 convertible with escort turbo running gear. I still have the shell, roof and other parts to advertise, so I may make another £3-400 with what is left to go.

I guess it all depends on how much you are getting the whole car for and what prices you are going to charge.
when deciding on prices, i made up a spreadsheet with all the bits listed on it and also had a look at other peoples parts for sale to get an idea on prices to charge. I have tried to price mine at a level that is not too cheap, but at the same time not too expensive that would discourage buyers