Why dont you see what you can steal from the classified adverts. I used to do quite well out of buying from privates, I never mentioned I was trade until cash was exchanged and we filled out the yellow part of the V5. Some people dont like you making a few quid out of them.
You get to tyre kick, test drive and suck your teeth then go low ball.
In fact only the other day Mrs C raised the subject if doing that again.