Generally, only rich people buy Bosendorfer. They buy the piano as a furniture. Therefore, since they have tons of money, they will not really bargain. As a result, Bosendorfer dealers are used to not to giving big discount.
Yamaha or Kawai, on the other hand, is piano for real people who use the piano to practice on. These people are usually not rich people, not rich people need to bargain because they do not have enough money. Therefore, Yamaha or Kawai dealers are accustomed to deal with these kinds of peopel. Once they sense that you are in this category, they know that they need to lower the price to the real price, otherwise, they will lose the business. Because these kinds of buyers will shop around. You cannot do this with Bosendorfer, because the number of dealers are very limited. Steinway is a little different, many paino people who really use the piano for practice are so wanting to own a Steinway piano. They feel that their life is not complete until they own a Steinway.
I used to be afraid that if I practice on Yamaha, I won't be able to play on Steinway or Bosendorfer. After trying many Steinways and Bosendorfers, I have no doubt anymore that their action and touch are about the same. The sound, however, are different.
Are you going to buy a Bosendorfer?