Here's the deal. 2010 price on Mk V combos were $2099. As of December 2010 the price was increased to $2249. We can sell an amplifier for whatever price we want, either higher or lower than pro net pricing. What we cannot do is advertise an amp for less than pro net. So as of december 2010 all of our pricing had to go up to current pro net.
However, as long as we still have 2010 stock, we are inclined and allowed to sell them at the old price, although we can't advertise it as such. Something boogie did allow us to do is place an ad on our website stating, "Call for special pricing on 2010 stock".
One possibility in your situation is the floor model was received before the price increase, and the new in box version you got was ordered after the price increase. Remember, dealers pay more too when the price is raised. Otherwise it could have been a mix up, or the dealer was just trying to eek a little extra margin out of you.
I think it was a mistake not to question the dealer at the time of the purchase. Did you get ripped off at $2249? No, that's what everyone will be paying this year. Could you have gotten it for $2099? Maybe, if the amp you received was ordered before Dec 2010.