I understand what you are saying. I have an LQS that I love and do often buy fabric there, but would never consider buying backing fabric or muslin there. I especially would never think of buying a notion there that I could find at Joanns or Hobby Lobby with a coupon for much less.
But they are very helpful, free FQ with every purchase (no matter how small), good classes and good fabric selelction and reasonable hours.
But I usually find myself buying my books at Amazon and my notions with a coupon.
They are usually busy enough, but still find time to help you and ask about any projects.