Nice replies; thanks people!
Axtremus: I have sold pianos before, but not in the US. I have heard that sales people of all commodities are more aggressive in the US. Level of player knowledge and expertise might vary regionally, but probably has more to do with the price range of instruments a store sells. Most stores have several brands they carry, each for a different a different level of player and budget.
sirpazhan: perhaps you mis-interpret me. Believe it or not, the salesperson is actually there to help you, by guiding you to the instrument that is appropriate for you. Thus, it is a cooperative relationship; a good salesperson will help you, if you can be a good customer by letting them. Otherwise, they will default to the assumption you are among the 70% that know little, and will talk down to you. When approached by a sales person, tell them your skill level, budget, and any other major influencing factors. You may be suprised by what they find for you. Sales people are influenced 90% by knowing the pianos they have in their store, not by what outside sources have to say. Very few people that come into a store wind up buying the product they had in mind when they walked in, because they end up finding something more appropriate for themselves. The final decision on purchase is always made by the customer, not the sales person.
faulty_Damper: profit margins for pianos are quite consistent. Variation in prices have more to do with other factors. Eg: how much the dealer pays for the instruments, freight costs, building rental, staff salaries, and other related operating costs customers don't consider and wouldn't care much about anyhow. But they are realities. There are some variations in pricing regionally, but this is changing as customers start shopping more globally. This trend in itself is worriesome, because I have seen many instances where the same model of piano varies hugely in quality and consistency; there are sweethearts and lemons. Words of wisdom: 1) shop in person, and 2) you tend to get what you pay for. Beware of what appears to be a deeply discounted item. The dealer has some motivation to get it out of the store quickly.
George K: those dealers were being honest with you. It is a pleasure to have a talented, or at least learned customer. It impresses other customers that people of that calibre shop there, and it is nice to have a quality live performance. Again, you are not playing in front of teachers or adjudicators, but people who truly enjoy piano music. Sales staff do as well, or they'd find another, more lucrative commodity to sell. It doesn't work as well if the playing is done by store staff; it looks more like a sales pitch. Indeed, a piano store is a wonderful place to show off your best in a non-pressure environment. Just don't overstay your welcome... these expensive instruments are for sale , so if it becomes clear that you are interested in using the shop for a playground over interest in purchase, you may be encouraged to move along.