Yesterday I was looking at ebay and out of curiosity did a search of Morgan cars. Quite a range in there. The quoted value for some looked ok for the model but others were low. The value on many was described as a minimum but one I recognised was a few thousand£ lower than a previous dealer ad for the car.
There used to be an app for autotrader which tracked the way that the advertised price for a particular car was changed by the advertiser. Havent seen it around for some time now - likely killed off by the trade I guess.
