Handover or had over

Took our caravan in for trade in after agreeing a price only to be told an absolute pack of lies by the appraisal guy, on leaving their site totally dissatisfied by their treatment, I took my caravan back to our service centre with the report they had conjured up, bottom line is they told us exaggerated claims tried to hoodwink us out of 2k on the deal, after talking to others in our club this seems to be the modus operandi for this outfit, needless to say I will not ever go back to them I will also advise anyone else to tread very carefully with any dealing with this outfit, we have had another full report form our service centre and there are no issues at all with our van that would warrent a 2 k reduction and the price they offered in the first place was the bare minimum, we have since visited several other dealers with our van so they can evaluate it there and then all offered considerably more to trade up and we finished up buying a caravan over 27k so Prestons clean up your act get some moral back bone and stop ripping people off with your lies and exaggerations