Online resources for buying (and selling) an RV
Roosevelt Trailer Company - Full disclosure, this my other site for Teardrop and Squaredrop Trailers. A partner and I build and sell these so if you're in the market for a tough little trailer that's easy to handle and tow, check us out.
RV Trader - A huge selection of RVs for sale near your location and nationwide.
RV USA - Another site with nationwide listings of RVs for sale in addition to parts, info, and a forum.
Camping World - Buy and sell RVs plus a large selection of RV parts. Tends to be expensive though.
Autotrader - Yes, you can also find RVs on Autotrader along with finding your tow vehicle.
Craigslist - There are deals to be found here as well. Just watch out for the scammers.
Facebook - Facebook Marketplace is another place to look for deals as well. A lot of it seems to be junk but it's still worth a look.