Selling my S3, need help with price..

I recently sold my W reg S3, same mileage in mint condition, with the spec below for £5750 in may to a member on here

How the trade sees it :- from Glass's guide Nov 10





Audi S3 quattro
1.8 Petrol 3-door Hatchback
6 Speed Manual Four Wheel Drive
Year: 2000 W
Mileage: 98,000




Part-exchange Price:
Excellent condition:
£3750
Average condition:
£3340
Below average condition:
£2910
You can add £700 to £800 for a private sale.
Check out trade sales advertised on Autotrader and completed listings on Ebay to see what the market will support as it's quite hard to value cars that age. Out of interest I may well be looking for a new S3 or BMW 335i in the new year and will be selling my S3 1999 on a V,91k. Obviously will try for the best price , but would prob. settle for £3500.

an honest price would be to get between 4100/4300 on a private sale, adverised for 4500ono