Juno were always a dance music (as in EDM, not waltzes) site, as was the original record shop on Berwick Street IIRC.
But fairly recently they seem to have picked up access to a very extensive back catalogue, as witnessed by you finding some fairly recherché jazz gear at sensible prices
You’re right about Chet. It’s a lovely album. I’ve had it on cd for about 20 years and never tire of it.
I recently bought two other Gil Evans albums - Priestess and Out of the Cool. I really like both so I thought Into the Hot would be a safe bet but the first listen suggests it’s not great. I’ll reserve judgement for now.
Edit - I just read the allmusic review by Scott Janow. It explains a lot. I should have read it ahead of purchase. Hey ho.