Nick, if you don't know Bandcamp or CDBaby websites, it's worth you having a look.

You can use both of course, but I use Bandcamp a lot and I buy MP3 albums from there.

I get the impression it's very easy to set up a Bandcamp page. The nice thing about Bandcamp is that listeners as well as recording artists can set up pages too, so you can "follow" other listeners with tastes similar to yours - hence Bandcamp in effect provides a certain amount of salesmanship by default.They take a cut of your sales, I believe, but less than Amazon and iTunes.