I'm a new member in Middle Haddam (near Middletown). I am also new to Connecticut, and I'm trying to find good places for gear and service. I have found a couple so far:
Merle's Record Rack in Orange (between New Haven and Bridgeport). Mike is great there, in my experience, and they have tons of albums, CDs, and Equipment. They also service equipment. Their prices are fair for the market IMO. They beat online prices by a mile and they have zero junk and stand behind their stuff.
Antiques on the Farmington in Colinsville is an antique mall, but there is a booth upstairs with some equipment and a few albums, tapes, etc. There's not much, but it is worth it if you're in the area. I haven't met the guy but have dealt second hand. He seems reasonable and his stuff is not junk.
I did find one place in eastern CT that is completely off the radar as far as I can tell. I have only been once, but I was very impressed. I'm reserving a recommendation until I have a little more experience with them.
I haven't had any luck in Hartford area so far. The places that I have seen are either repair only, and I have not used them yet, or they are not my taste. I'll leave that there.
I also have trouble passing Goodwill, Savers, etc. for albums or equipment, because you never know.