Facebook marketplace, set location in various regions. (Ymmv)Ebay (flooded with junk, diamonds in the rough are either overpriced or seller wants high shipping)Auctionninja.com (like shopgoodwill, but higher quality items on average and higher final bids on interesting items)Hibid.com (I've gotten a thing or two here)Estatesales.net (I've gotten good deals here)Estatesales.org (usually redirects to respective company sites to bid there)Shopgoodwill.com (hard to win bids on interesting items)Goodwillfinds.com (the higher end/rarer items they receive go here, so higher prices)Craigslist (usually baren of typewriters)Kijiji (I don't find much that's both interesting and feasible to ship)Etsy (meh, overpriced)