TBH pal, and this isn't to knock your car or creat arguments etc. But I really do think that £13-14k is way too much for your car. At the end of the day, a person could buy that mint Focus Cosworth that was on sale for the last 2 months for around £13k. But that car had everything done, pure perfection. AP's, flocked dash, RWD, 350bhp, custom everything, fuel cell etc.
To interest real buyers, you'd be better off starting at a realistic figure such as £7,500. That's with everything working perfectly.
If I was to sell mine, which is near perfection, paint work, underneath and all, with a lot of custom parts and everything done to the highest quality, I'd probably only recieve around £10k...or so the offers have been.