Why do some dealers


Carry the same exact lines for years and others have new lines every 6 months? 

taters
Well, it could be both. Many people prefer 'drinking by the label', myself included just not 'one label' but few.
OP-

because most dealers/retailers are Flakes, in general.
Keep me posted & Happy listening!
Jafant said that most dealers are flakes. In general I would have to agree with that. Although I have run across a couple of really great dealers.