This is s tough one, as you don't want to insult the seller, honestly I'd say $4000 if you really want it. There have been some clean coupes for $3500 recently. I would print out the ads from the USA & Canada section and show them what the cars go for. This is a classic case of what it is worth to you...............if your happy with the car for the price you paid then who's to say it was to much.

Tom