Most of my shopping recommendations end up in my newsletter, but I feel like it'd be cheap of me not to share at least one thing here. This is actually a biggie, at least for my own online transactional practices, and I haven't written about it anywhere yet. Basically, this app funnels the results from all the resale sites (eBay, Etsy, Vestiaire, Grailed, The RealReal, etc.) onto one platform, so you don't need to comb them individually for your saved searches/designers. I just bought a barely worn Dilara corset for $300, and I've previously found Pleats Please pants for $100 and an '00s Chanel suede halter for $700. The interface is so straightforward and un-noisy, just an ad-free infinite scroll of results that actually match the query.