Jason..... I have bought quite a few from them over the years. My method of madness is to always talk to the gun room manager if possible.
The stores that I frequent are big users of Blue Book and I try to use that to my advantage by talking condition vs. retail values. I have developed a relationship with two stores gun room managers.
I will make a very reasonable offer always. I don't try to low ball them. Then I leave my card with the offer and tell him if he does sell it by when he needs to to give me a call.
He has called me about half the time... but it may be a month or so before he does.
I react quickly and pay cash when he calls.
If I do not hear from him in three weeks or so, and I really want the gun, I will go by the store, and if he still has it, I will up my ante a little to see if he will bite.
I have been fairly successful doing it this way,
but I have lost some deals too.
Guess that's the fun in it!