Ask HN: Suggestion for a mobile marketplace please?

Hello,

we're working on our mobile app that will include a marketplace between users.

I was wondering if please any of you could suggest me some mobile app to study - I'm on iPhone -

I'd prefer with a "cart" system so users can buy multiple object from the same user.

We started to work taking DePop - ex Garage - as example.

Consider that we're not planning to have a website were manage order etc

Best, F.