I have a fanpage I’m not doing anything with at the moment that I’m willing to sell.
For a while, I had an RSS feed pulling cute puppy videos from YouTube and automatically posting them on the fanpage. That app went out of business and the page has been inactive for a couple years.
Even though I haven’t posted in a long time, it gains about 100 new followers a week organically. It currently has 6,500 followers. First $100 USD takes it (through the Swapd escrow service of course).