Yeah I did that too with my first new car, a 74 Olds. I went to the local dealer first and asked for the best price, then shopped Minneapolis and bought one. When the local found out he called me up and complained why I didn’t come back to see him. Sorry but I gave you a chance. My next one I did buy from the local so no hard feelings but business is business.
When I buy cars, I don’t talk price. I talk about the car I’m there to see and the other cars I’m looking at. When the salesman sees that I’ve done my homework, he often offers a fairly attractive price to start. On my Accord, he started out below invoice. That negotiation didn’t take long.