There's a local music store I hate shopping at but which I am forced to do business with once in a while. They're the only ones open at the sort of time of day when one might break a string before a gig and within reasonable driving distance.
I hate shopping there because there's always a minimally-paid teenager behind the desk who knows absolutely nothing about anything and can't handle any questions beyond reading price tags or acknowledging whether something's in stock. If I ask anything tougher, like, "do you know if this is a new or used amp?" they can only respond with a shrug and a "uh-uhh?"
They probably can't hear half of what I say through the thrash metal that's blaring out of their earbuds.
Yet.. that store stays in business. Probably because morons like me keep giving them money.
If your seller isn't giving you satisfactory answers you shouldn't reward them with your business!
