The problem is that if it is a really good quality product that ALSO makes some revenue, I doubt people are looking to sell on those sites. You have to go hunt yourself. Once in a while, you may be able to find a Gem on those sites but yea, most are not worth the time/money unfortunately if you are looking for something more than a simple side project.

FWIW I have multiple revenue generating businesses that I'd be open to selling for the right price, but IMO there's nowhere to list them that warrants my attention. I don't want to list my business alongside bunch of $0/MRR side projects asking $10k.

Can you share which ones ?

Feel free to email me

They don't have many other options though. But it's very time consuming to go through all listings.

It might be worth reaching out to the site owners and cold emailing products you find interesting, but are not currently maintained well.

I'll definitely do that, but this is a first more lazy attempt :)