Hi Sarah,

A disclaimer first: estimating used car values is an inexact science at the best of times, and the market is abnormal right now with prices generally inflated. We can try to give you an estimated value the car would sell for, but that may have little relation to a trade-in price a dealer will offer, as they will offer considerably less - and the amount offered will vary considerably from dealer to dealer, too.

FYI: the new tyres will have little effect on the price offered by a dealer. 

I'd estimate that your car could sell privately for about €2,800 so a dealer may offer as low as €1,500 as a trade-in.