Downsizing the family car

This week I sold my largish car (7 seater Ford Galaxy type) for a small 3-door number. The old one was making some horrible noises and would have been too expensive to fix - the new one is poky in comparison but still gets us all from A to B. Will the Official Receiver let us keep it? The bottom line is 'I don't know'. It's value is somewhere between £3000 and £3500 and I've heard that the Official Receiver will go after vehicles worth more than £2000. We need a car, and I'll work to make that case - but I'm not getting attached to it. You never know.