Is it petrol or diesel?
I would reckon from looking at cbg.ie and other car websites possibly between 2,500 and 4,000. Its only worth what somebody is willing to buy it for.
If you are trying to sell I would sell it privately.
If you can sell it for €2000 privately, then you can negotiate a discount as a "cash buyer".
Depends on whether you have the time and want to deal with the hassle of selling it yourself.