Being seen in TB everyday is not the same thing as common. Common is Fender or Ibanezes. Most people can't hop in a car and try a Sadowsky and be home in an hour or two.
If you weren't so eager to argue, you would read my post more carefully. I specifically mentioned used basses, which are what people buy on the TB classifieds. It is very easy to buy a bass used and sell it for the same price at this site. I have done it many times.
I don't think most boutique bass purchases are impulse buys. I think many people are just willing to use their resources to try to get the tone or feel they imagine they want.
Everybody isn't addicted to the classifieds. No need to get pissy, just because you contradicted yourself. What makes you think your post are so almighty that they deserve such study? Since Roger is posting/reading, the assumption is that we are talking basses that go from him straight to his customers...you know things he can control, and what a future customer might expect from dealing with Sadowsky...not whether you can find one at an estate sale and flip it for a profit.
Buying a hand-me-down, and buying new are very different experiences. By buying new, you get the chance to get exactly what you want, straight from Roger. Buying used, your are buying what someone else thought they wanted, and did "who-knows-what" to it, trying to make it what they want, assuming it only had one owner...if it had more than one, the odds of getting a true representation of the bass and the company gets less and less.