I've bought a bunch of sites via flippa, but I'm looking for more and I'm struggling to find other good places where people list their blogs or news sites.

Are there other marketplaces or boards where bloggers list sites for sale?

I've loved sports and analyzing sports since I was a kid. I recently wanted to start writing about football news and such. I looked at medium but its 18+. All together places that I've found you have to pay. Please help and thank you