I'll answer this post too then
Auxilary fan is £123 + fitting (just had mine done).
Prices
are all over the place depending on condition. Anywhere from £5k up.
The top prices for Highline spec cars ('87 on) are £10 - £12k which is
really into specialist dealer territory (ie Munich Legends).
The
problem is finding the right person for your cars condition. For some,
the price will be right but the condition isn't good enough, for others
the condition is right but the price will be too high. Remember, every
prospective buyer wants the car for less than you want to sell it for.
Selling a car is a complete pain.
Have
you been to Munich Legends at Chelwood Gate? It's only 20 miles or so
from you. They may be interested as they have a queue of people waiting
for cars. Just don't get upset if they say no or give you a long list
of things that would need to be fixed. They operate at the top end of
the E24 market & their customers are fussy.
Without seeing
the car but assuming it has a proper full history & doesn't have
any pricey jobs that need doing I would say £8k+. You could put the car
on ebay with a reserve price of £8k (or more if you feel it's worth it)
& see how it goes.
Hope this helps.