I don't live in the US but classifieds are more user-friendly in other countries.

You can't launch Craiglist in 2017 though. I know that there are numerous exceptions from the 00s and even from the App Store 5-6 years ago. But it's not the same anymore because blue oceans are rare nowadays.

I like Facebook Marketplace because I can search with in X miles of my location on my phone and I don't have to check, "Has Photos" like craigslist.

Ebay has a Craigslist competitor, too, in Germany running as ebay Kleinanzeigen.

Is that not what gumtree is in a lot of places?

That's what I've used in the UK and Australia, an ebay own it too.

Exactly