I have been fortunate when it comes to stereo shops. And I do believe in having valuable relationships. Over the last 3 years, I've been more active in upgrading than I expected and I think part of the reason is the rapport with the local store.
The openness has resulted in me acquiring demos or being informed of potential trade-ins from other clients when it fits into my goals.
I'm sure they have clients they don't like to see... and when it comes to 'value' I enjoy listening to music more than ever.