Yep, agreed. I don't really understand why 1stdibs even exists, since I can't imagine anyone ever pays these prices. Chairing and Pamono (now owned by Chairish) also is generally inflated.

My go to sources are Selency, Vntg, Instagram, Catawiki, and then a bunch of online stores across Europe I've bookmarked, including auction sites like Bukowskis in Sweden. The smaller vintage stores are the ones to go to generally.