That is where a dealer takes a little known and often times, not very good, artist and promotes that artist only within a certain area of the country, region, or stylistic circle. Most of the time, although I cannot say all the time, such an artist's work will only sell within that region or stylistic circle. Rarely does a collector get as good a value from such work when the time comes to sell the piece. If you just like the piece and are not concerned with resale, that's fine, but you should be aware of some pitfalls. This is one of the reasons why I want you help you to learn how to recognize good works of art in terms of composition and execution of the work.
Marketing is only as good as the marketer.
One of the most important aspects of the art market and art collecting is your value analysis of a work. There is value, excellent value, in your enjoyment of a work of art. You should buy what you like and enjoy your art purchases. I have told students, adults, museum patrons, new and well established art collectors that good art is art that you like. Good art is art that you know about and to which you can relate.