Smokingpipes is great to deal with. Their no questions asked return policy wins me over. Great folks. I want to get a Musico from there.
Marty at Pulvers is one of my favorite places to buy from. He's got some terrific pipes and prices are fair.
Blueroom Briars is excellent to work with. If you haven't bought from them, you should consider it. Great pipes. Excellent restorations. Cool selection. Great guys.
I have bought a lot from Pipes2smoke - you can get some great deals on estates and Ashtons there. Maxim is so knowledgable.
I'd like to buy more than a Bullet Proof Cob at Red Dog... It's just that he sells out of everything too quickly.
Boswell's has terrific pipes and excellent customer service.
The Danish Pipe Shop, Pipe Divan and LePipeit. have all been great international sellers.
Pipestud is awesome.
The Briary...
Baki Pipes (Meerschaum)
There are too many good vendors.
My favorite? Well, I like them all. I'd have to say I spend the most time on Pulver's looking at pipes.
I'd like to buy a Sir Douglass Lovat from Blakemar Briars... They are always out of stock on that item. Jay says Blakemar Briars is terrific.