Houston has a great vinyl store for new vinyl; Cactus Records on Shepard, and I just found one around the corner that I had never seen Black Dog Records, that has been there for 20+ yrs. They have new vinyl, but specialize in great copies of old vinyl.
I also buy a ton from MusicDirect and some from Rhino and Amazon.
I also buy a ton from MusicDirect and some from Rhino and Amazon.