Ask HN: Anybody selling their side project?

Hi, I've been looking around on flippa etc to see whether any real web app is for sale. My reason for buying is just to experiment with various things related to running a site, do lot of trial-error and gain some confidence before being able to eventually launch my own. Unfortunately, the results you find there are sickening if you want a genuine web app that does something.

I know lot of people on HN own several webapps. Wondering if anybody willing to sell something? I tried to find a proper marketplace unlike flippa (i.e. without scammers) but couldn't, hence the post.