Music Direct for new pressings of favorites. But, I think used is the way to go. Google for used record websites, there are some which rate the condition of their vinyl. Ebay has plenty of used vinyl. I think for many, especially jazz, the original pressings have better sound quality than even the new 180 and 200 gram offerings.

Enjoy the Music. Trust your ears. Laugh at Folks Who Claim to Know it All.