Ask HN: How Do You Sell an Open Source Project?

I've been running Gitignore.io for 7 years now, but I'm looking to roll off of it and focus on other projects. Right now the time commitment for this site is about 5 hours a month as most of the site is automated. The site generates about $60 a month in revenue from the an ad partnership and the site sees about 85,000 MAU's. In terms of cost, the site costs $0 to run on a free Heroku Dyno and the only cost is the annual .io TLD registration which is covered in one month. I've been trying to sell the project but I'm not really sure how to go about doing that — I would love some feedback if anyone has any experience selling their project.