I use B&H for nearly everything now that I’m in Viet Nam. While I lived in Portland I’d go to Blue Moon Camera, who advertises here on APUG. One great thing about Blue Moon is that they’re transparent about the condition of their gear. So they’ll tell you if the shutter speeds are off. Or if they don’t feel confident about the shutter they’ll say something like “shutter speeds are good now, but no guarantees for the future”. Otherwise I believe their warranty is six months, and a full year on newly CLA’d shutters. And they sell chemistry, etc.
If you’re looking for large format cameras, dark slides, lens boards, etc., I can’t say enough good things about Chamonix. Absolutely wonderful gear.
Avoid the stores who list lenses for sale and describe the shutter speeds as accurate on most of their lenses and then suddenly say “shutter sounds accurate but we haven’t tested it.” They’re looking to fleece you.
Cheers, James