Welcome to one of the downsides of zed ownership. The dealers vary a lot and some, as you have found out are rubbish. They will be trying to work out if they can get a car that you will buy. My local dealer has a base 55 plate roadster on at 20k so many still havent got a handle on the market.
1st recommendation, buy one from a member on here. You can search the owners posts and get a good idea of the cars history. Either that or get a recommendation from an owner on one of the better dealers.
Independants may not know the cars very well but someone local may well be happy to come along with you.