What is your go-to online place to buy physical medium of music? And why?

Oops, forgot to mention why I buy where I do - cheapest price and availability.

Records by Mail is good. I once bought a wharped record from them, and Craig said to throw it away and gave me a refund. Usually priced higher than ebay but often worth it.

I am a regular on smile.amazon.com (where they donate .5% of my purchase amounts to my favorite charity), have the Amazon credit card (giving me 5% cash back) and have an Amazon Prime membership, enjoying 2 day shipping and Amazon Streaming to my TV.

Besides all that, I find the reviews on Amazon really helpful, especially as I'm learning more about classical music.

"The brunt of the question is pretty much covered in the title, but just curious where most people are buying any physical medium of music (vinyl, cassette, 8-track, etc.) online."

Where's the recommendations for cassette or 8-track? Got to say I was a little amused that they were included in the list. Guess they can still be found on ebay or craigslist.

Thanks everybody! Personally, the only thing I'd used for online purchases is Amazon. And it sounds like a lot of people corroborate that choice. Some of the other lesser-known (to me) options look really good as well so I'll definitely check those out. The interface of Discogs I like pretty well but, personally, the Goldmine Grading thing just seems kind of non-sensical to me.

@tls49 haha. I personally don't listen to cassettes or 8-tracks anymore but, surprisingly, cassettes are actually making a significant comeback - similar to how vinyl has had a huge renaissance in the past 10 years.

A couple of interesting articles about the resurgence of cassettes:
- http://www.forbes.com/sites/jasonevangelho/2016/03/24/forget-vinyl-lets-talk-about-the-cassette-come...
- http://www.cbc.ca/news/canada/toronto/programs/metromorning/cassette-tapes-comeback-1.3490619