I've bought a couple times from these folks, a small outfit around Washington DC, that specializes in Jazz and Classical closeouts and indie labels.
They have an eclectic collection of offerings and outstanding prices from $2.98 to $39.98 (boxed sets). Ask to be on their mailing list; their catalog has several hundred select titles every few months. One of the more helpful things is that they review each title or, alternatively, use a review from Downbeat, Gramaphone, American Record Guide or other as a tool to help select and understand the recording.
You can't sample them online, as you can with Tower and others nowadays, but at these prices and helpful descriptors, you rarely get bad value.
They have a flat shipping rate of only $4.95 to the lower 48 and their sales reps are most helpful and willing.
http://www.salemusic.comor 1-800-395-2665 M-F 9-10 est & Sat. 9-5 est
Highly recommended, and I am not affiliated in any way to them...except as a darn happy repeat customer.