We do have a high-end consignment shop in my town. I think I stopped considering them as a selling spot because the one time I brought them a nice assortment of pristine items, they all got priced and hung in the shop and then COVID shut everything down. The "you will receive your payment no later than" date was in May 2020, when shops were still closed and I was in the throes of trying to feed four grown men without going to a grocery store.
So I let it go, never got paid, and that was not the shop's fault. They would be a good first start, and I can ask other friends who sell things where they've had good experiences. Of course LMA knows a lot about resale but he focuses on other segments of that market: vintage, menswear, Tokyo7.
Thank you all for your wisdom on this issue. It seems ThredUp is more trouble than it's worth and that is so helpful to know.