We definitely have a lot in common! I also have a horde of shoes I need to sell in addition to some more clothes.... I continue to have good experiences on tradesy. I have 2 listings on there that haven't sold in over a month but I just bought a pair of Chloe flats for 150 and a pair of Rag & Bone booties for around 200. I haven't received the Chloe Flats yet, but the booties were in phenomenal condition original box with dust bag. The seller negotiated on the price, great communication, and I found that with the seller on the Chloe flats also.
And yes as much as I complain about Poshmark I can't seem to stay off of it, but I don't think I would be as comfortable buying Chloe on Poshmark.
Edited to add I cannot stand the realreal or ShopHers or lollipuff. I won't even waste my time anymore. I occasionally will look through mercari but only for non high-end items..... the other thing I like about tradesy is they put things on sale. What that means for the seller I don't know, but as a buyer I get an email that says Welcome to our Shoe Sale (which is how I found the Chloe flats) and I just filtered out my size and the person still negotiated on price).