In the US, we can use craigslist to find people selling used furniture. Is there a similar website or app im Thailand?

I imagine that a website like this is even more popular in Thailand than the US since poorer people would buy and sell used items more.

 

Or is there well known or large stores that sell used furniture like office chairs such as the Herman Miller Aeron?

i got a lot of mine from facebook marketplace and also local facebook buy sell groups (search "location buy sell", hit groups tab)

 

there is also bahtsold

bahtsold.com is one place to look.