Listcrawler has been running this game for years, and it's still where a ton of legit providers post daily. If you're in a decent-sized city, Listcrawler will have pages of fresh ads every single day.
It's basic, raw, and a little sketchy looking — but that's part of the appeal. You pick your city, scroll through the listings, and boom: options.
Biggest pro with Listcrawler: It's fast. You can go from browsing to booking in under 20 minutes if you know what you're doing.