McKinney Buick GMC

I have kept receiving the quotation from this dealer all the time after I submitted the inquiry through Edmunds. At beginning I was thinking the dealer is good since they do have a lot of inventory. But I found they kept changing their commitment when they thought you are confirmed to buy the car. Just before I'm going to sign the contract and get the car, they changed again. I have to give it up. I will not come back again and will not recommend to anyone unless you like to be cheated. Negotiation is acceptable, but I don't like to be treated like foolish.