Where to buy vinyl?

OK, now I've got a Thorens TD 160 with SME Series III arm and Ortofon SME 30H cartridge. I've played the one new record I've got, Coltrane's Ballads, and I must admit it sounds great. So where do I buy vinyl? I prefer jazz, baroque and classical music, especially small groups. I'd especially like to try a few 45 rpm recordings.

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