Like what, exactly?
Haven't been to London for almost 9 years, yet I know London's never been like it used to be ever since Mole Jazz went belly up, but what's left of Ray's Jazz shop at Foyle's now, and what about the area arounds Camden Town and the upper end of Portobello Road (Honest Jon's)? Everything's gone, too?
Foyle's/Ray's has like three short bins of records, mostly overpriced marginal LPs - though they did have one beat-to-hell copy of Gyroscope for about $300! I poked around a few other Portobello shops and didn't see squat. Honest Jon's apparently has quit selling jazz - they also moved, so they are a ways out west I think.
Good Records NYC puts all their stuff on eBay.
I remember one store in Evanston where you had to pay for a record before you could look at condition... that was a racket if I ever heard one... minimum prices were around $40 and that included random Jarrett ECMs and so forth. Waste of time, now closed as you might expect.