Robins Classics used to have great daily drivers at killer prices. But as the site became more popular, of course the prices have climbed accordingly, but still very reasonable. I've actually emailed Baxter regarding prices at Robins. They've said (this was a few years ago) that if you could get a bike at those prices, take it.
I was going to buy 2 bikes through Robins several years ago, but his business was not as mature then and he couldn't arrange shipping farther than nearest POE and the only way I could get them was if they were delivered to TX, which he couldn't do at that time.
Domiracer used to have bikes at really over rated prices, but once was THE place to get NOS Brit spares. I used them to restore a 67 Lightning and to keep a 73 Trident going. They were the absolute hands down best for NOS parts. They published their own specific bike parts catalog and could just about build bikes from NOS spares. Apparently they still have bikes, but some are still there that I first saw 10 years ago for what that may be worth.
Baxter is reliable and will be around forever, can't go wrong there.
RPM Cycle in Dallas is something like Baxter, but is a much smaller shop. They are probably the undisputed best Brit bike specialist for any bike/year. A friends dad (in Dallas who rides a Black Shadow on Sundays) bought a Meriden Daytona 500 from RPM and was unhappy with the handling and power (go figure), so he took it back and rode home on a new Speedmaster.
Shops that deal in old and new Triumphs are rare animals indeed and they deserve all the care and feeding we can give them.