Marco1,
Here's hoping. They are selling a commodity and a service, if you don't add anything to the equation why would I pay your mark up? My ideal dealer: friendly, courteous, knowledgeable, and honest staff. Trade up program. Loan or try out period. Good selection of products. Repair service, or at least assist with repair. Clean and organized show and listening rooms.
I know that is a lot to ask, but if I'm paying a 30%, 40%, 50%, or 60% mark up.....that is my baseline. Otherwise I'll buy direct, and sell second hand online if I need to.