I think, Dan, that one of the problems is that many TOTL arrangers are handled by 'Mom & Pop' music stores that deal real pianos, school brass, 'home' digital pianos (lot's of fancy furniture, little great about the sound) that work on generally higher margins than the stores that handle 'group' music stuff, guitars, amps, synths, WS's, etc..
I know that when Roland introduced the G70, they transfered the dealerships from MI stores over to the CK division, which handles high margin, high price KR-series home pianos and Atelier organs, etc..
Immediately, the MAP jumped nearly a grand... I had to pay quite a LOT more for the G70 than my G1000, even taking the MSRP into account.
It has now been transfered back to MI division, but the damage has been done. Many stores that USED to stock G1000's have now grown distant from that market... But those Mom & Pop stores were MUCH harder to negotiate a deal with, on the whole. They had exclusive rights to their territory, and internet sales weren't allowed for those lines. I was quite vocal at the time that it looked like Roland were shooting themselves in the foot, and I believe this had an awful lot to do with the failure of the G70 to be as popular as the G1000 was.
Now, I don't believe this is necessarily universal, but you DO have to look at the kind of stores that actually STOCK T3's, PA2Xpro's, E80's, SD-1's (and soon, Audya's) and realize that few of them can afford to (or even want to!) go down to the margin that internet retailers can do, because of their lack of overhead.
It is sad (I kind of get your point, I think) that the whole retail MI business is going down the toilet because their customers don't equate paying a bit more (as little as a few hundred dollars on a $3500 product) with getting the kind of service that they moan about when they DON'T get it.
Why anyone expects knowledgeable sales staff and well stocked shelves at a Guitar Center or Best Buy amazes me. They aren't PAYING for those things. Pay less, get less. Pay more, get more...