how many km does it have on it?
That would factor into my decision just as much if not more than the age in years.
If you do get EUR 5000 for it, I'd say EUR 2000 wasn't too bad to spend on car ownership over those two years.
If you use the car so little, and you live in europe, wouldn't it be pretty practical to take trains even on the out of town trips of 1 - 5 hours away, 10 times a year? So you could get rid of the car altogether? (This displays a pretty narrow view of Europe..realistically I understand you can't get everywhere you'd want to go via train.)
keeping a car to be used so little kinda stinks because you pay for car insurance and other holding costs, that as you mentioned, don't change with usage.
I too love my vehicle, and the way I see it currently is that continuing to own it and fix things incrementally will for a long time be cheaper than outright buying another car.