It's all predicated upon supply and demand. The upper end stuff (Barons, King Airs, Citations, etc) won't be hit as bad as say, the 170-182-210, Cherokee, Grumman market.
I would sexpect that if we get whacked with higher taxes and fees we'll see a slight dropoff - say on the order of 5-10% in our birds. i.e. - what was say a $20,000 bird now getting 18-19 bills.
Someone's tryin' to kill general aviation and they're doing it bit by bit, blow by blow. Man - how good it was in th 60's before the lawyers got to it and things were (relatively) reasonable from a regulatory standpoint.