Whart -
I guess it depends on the product but a reputable dealer, who is not going to discount or throw something up for sale on the Internet (selling out of territory), should be able to secure a product or put the customer in touch with a reputable dealer. Serving the client must always be the focus.
Years ago we had P.A.R.A. (Professional Audio Retailers Association). It allowed professional dealers to meet one another in a friendly atmosphere to work together to strategize on numerous topics, solve system problems and, ultimately, to form lasting friendships. I had no problem referring clients to a friend in the business if they had a product my client required to achieve optimum results. It was a win-win-win: Client's needs were met, Customer was pleased with my guidance, and that dealer would reciprocate if one of his clients needed something that I had.
A great system will stand the test of time, provide years of enjoyment, and could then be passed on to one's children. Case in point is a piece such as the Nagra 300i - built from the ground up around the 300 tube. It's won numerous design, engineering, and best of show awards and maybe 20 have been manufactured and circulated worldwide. In fact, we have 1 of only 3 that ever made it into the USA.
Nagra is a great example for another reason - I choose my lines based on my ear and experience - not by magazine reviews or manufacturer advertising budget. I think we are one of only 3 Penaudio dealers but in the months to come everyone will become more familiar with Penaudio. Same was true for Berkeley before all of the reviews had hit...and Modwright who we've been with since day 1.
Chances are that the next great thing in audio will come from a smaller independent company such as a Berkeley...or a Wavelength (who gave the world Asychronous technology?)...or a Modwright. I spend thousands of dollars every year to walk CES and find those breakout products long before the audio press is able to publish reviews. This is another service that dealers provide - to let customers know what is coming so that they can advise them properly. I've saved customers hundreds of thousands of dollars by preventing them from buying technology that was soon to be obsolete.
I can keep going on and on about the services a professional dealer can provide but it sounds like you have a good understanding. As I mentioned in my original comment - not all dealers are cut from the same cloth but customer oriented dealerships, such as mine, do exist.
Burt - Seattle Hi-Fi