If you never listened to Sinatra, but thought you might try some day - $3 download

[RAMd®d]

This compilation certainly has some of his most famous stuff.

Reading the Amazon reviews, the remastering (and remixing!) have done more harm than good for any serious listening. I've got most if not all of these cuts on other Sinatra albums and they sound great.

But if you're listening is more casual and/or on non-HiFi gear, this should be a good purchase.