Sites to sell stuff free or otherwise

Hey, I have proficiency in art and my Tumblr blog is getting a good bit of traffic from pic based posts. What I want to do now is use my skill to offer free downloads to art which I would make and offer the source file as a paid download.

Are there any sites which allow that?

(I tried PPD and PPI but those failed, no one installs the added crapware and when the do, it's not worth it)

If PPD doesnt work it means that the people do not want your art bad enough to fill out a survey. I would just try to build a list. Make them sign up to get the free DL. Though im not sure what you would sell them down the road. You could also try and sell them personal art like have them send you a pic and then do something artistic with it? Just attach your email or make a quick site where they can contact you.

Also, tumblr folk are much more savvy then the mongoloids on FB so its a little harder to get them to do PPD PPI type stuff.

Good luck to you.