Piper Chuck - I don't think that is really bargaining. Bargaining is trying to reduce the price so that you get a better deal. Here, you are asking him to reduce his price to get the same deal you would if you go somewhere else. I think anyone in the business would like to know why someone wouldn't buy from them. Any additional piece of information is helpful. Maybe his prices are too high and if enough people reflect that on him, he may reconsider his pricing strategy. He could end up selling much more high value items.

Anyway, I believe that most store owners could differentiate between someone who comes in with a specific model in mind at a specific price and once he cannot get it turns away and someone who could potentially could be a loyal customer but just needs the right conditions. As DadsToysBG says, work with the guy.