Chad
Slender Hobbit
The problem with only selling used is that you have to make an effort to keep good used guitars in the store or you’re just another pawn shop. That means paying someone to drive around America buying gear and sending it back to be cleaned up for sale (at least that’s how the good used shops in NYC do it). It’s not like GC where the used gear is just there to bump up the overall margin.
There is an awesome shop in MD, Atomic Guitars (well, I haven't been there in probably 10 years, but it is still going strong. They have moved locations since the last time I was there) and they only sell used gear. They are pretty cool and don't bend you over backwards when you trade in.