Ask HN: How to sell eBooks etc without the hassle?

I have some ideas for some side businesses selling ebooks, clip art collections, that sort of things. I'm a web developer, but I don't want to write all the payments handling, sending files stuff myself. Can the HN community recommend any site that current does that? I'd like to be able to send them a file of my finished product and have some way to redirect the users to that site to buy stuff.