There's not been too many for sale recently and certainly none have been hitting the high prices of last summer.
Condition, Mileage and originality are key to higher prices
Cars currently for sale range from a 70k mile car at £19,995, one with 135k up for £12,995 and a nice clean example a couple of miles from me a 1989 with 128k up for £13,750
E-Porsche not far from you, has a 1990 with 118k up for £13,995
I completely agree about the wheels, 10 potential customers can suddenly become one just by something as simple as wheel colour.
Also put the original steering wheel back on.
If you want to chat to dealers that may be interested, you could try Paul Stephens or Philip Raby
I'd start with Paul
http://www.paul-stephens.com