Where do you buy your CDs these days?

If you truly need me to be serious then what is wrong with eBay??
For the few CD's and many records/tapes I have bought this year online by far the bulk has come from eBay.
Discogs grading is out to lunch IMHO.
It's fairly easy to pick a decent eBay seller by their feedback and items for sale.
Try it,they usually side 100% with the buyer in any disputes too so very little to lose

Don’t buy em but check out   
www.oldies.com.

I buy very few but when I do - - Amazon.  A very good source for used cd's at good prices.

I buy ones that are new that I read about or old ones that I never got around to buying from Amazon, but I have bought many great CDs in mint condition, largely classical, some jazz and also some interesting rock and mixed etc from Goodwill. I do it every Friday. The price is $2.29 per disc, and sometimes they’re doubles. Yesterday I got an an amazing Janos Starker Mercury Living Presence as well as an Itzhak Perlman Greatest Hits and a perfect copy of Psychadelic Furs Midnight to Midnight for $2.29. The real motherlode is in the classical though. I come home with these mint discs, and look them up on Amazon and they’re $30.00 or more sometimes!

Agree with @uberwaltz 

I typically only buy LP’s from Discogs these days, but CD’s? You can always find good deals on eBay, many times with shipping included in the cost. I’ve gotten some great CD deals on eBay.