If you don't like the price, don't buy it and move on. Two pins of the same title can vary in price by more than 50% depending on many factors. Condition, mods, demand, etc.
I am a new dealer. I sell my machines shopped, with a full warranty, buy back guarantee of 80% of the selling price, and offer a selection of over 35 machines and I get people all of the time saying that my prices are high. I'm glad that we live in the USA. We all have the choice to buy and sell at whatever price that we want, and if we don't like either we can move on to the next seller/buyer. There is no need to be a dick, and it is absolutely not your place to tell someone what is the wrong or right price for any item.
Just mind your own business and move on, or you are truly being a dick. Those rude people are the ones that want full retail for their non-shopped machines and are not willing to pay a little more for a machine that is 100%

Manny
Lights Out Pinball