Recommend me an accelerator/community for buying/growing online business (SaaS, content)

Here's a long shot: https://www.producthunt.com

A few days after launching my Viral Post Generator on PH, the founder of another startup saw it there and reached out to me with an acquisition offer. I ended up selling it to them.

Product Hunt could be great for buying and selling online businesses :) It's a huge directory of recently-launched products, after all. There are discussions and ways to collaborate with other creators inside PH, too.

Not an accelerator but I have been building an entire ecosystem for Micro SaaS builders at Micro SaaS HQ. It comes with Deep-dive reports, access to interviews/data-points, Detailed analysis on trends, costs, technical chops, marketing chops etc and above all a super awesome community of builders.

You should try Indie Worldwide and High Signal

https://tinyseed.com/ is an accelerator for bootstrapped online businesses

Doesn't seem online-focused, but you might find some helpful resources from the search fund coalition

Hey, have a look at this community: https://www.swiftangels.com