Where to buy used furniture?

My wife and I are big into upcycling old furniture, but we're new to the area and are struggling to find good places to look.

So far, the thrift stores don't seem to have a lot of furniture we're interested in (mostly hotel discards) and people on marketplace are flaky at best.

Specifically, we're looking for end tables, coffee tables, old desks, and things like that. We love mid-century modern.

Any suggestions?