Do I have to accept an offer?
Not if you don’t want to. If you receive an offer through your Car & Classic account that you're anything but 100% happy with then you can flat out decline it or make a counter offer.
We want to sell your classic for the right price just as much as you do so if you receive an offer that you think is too low, our advice is to respond quickly with a counter offer which can lead the way to successful negotiations.