Here are a few tips.
1) go on ebay, search your car. Make a note of the prices.
2) go on autotrader, search your car. Make a note of the prices.
3) go on the for sale section, search your car. Make a note of the prices.
4) go on parkers, search your car. Make a note of the prices.
5) go to the shop, buy a magazine, search your car. Make a note of the prices.
6) go to the newsagents, pick up a local ad paper, search your car. Make a note of the prices.
Just so you all know, any threads that appear in the mk2 section from now on will be locked or deleted upon sight, that have anything to do with what's it worth.
Regards,
A Very very grumpy man.