Find vintage trailers for sale by looking on specialized vintage trailer and camper classifieds sites such as TinCanTourists.com or VintageCamperTrailers.com as well as general classifieds sites such as Craigslist.org. Auction sites such as eBay.com also contain listings for vintage trailers in various styles and conditions.
As of March 2015, listings for vintage trailers on VintageCamperTrailers.com are not displayed as individual posts but rather as a continuous stream. As such, you can't sort listings to filter out any unwanted trailers. Each entry on the listings page contains a paragraph description of the trailer's conditions and features as well as several pictures of the trailer's interior and exterior. If you want to contact a seller about inspecting or purchasing a trailer, you must contact him through the information he includes, which is typically a phone number.
Alternately, you can sort listings for vintage trailers on eBay.com by a variety of criteria, including price range, condition, trailer type, manufacturer, location of the seller and the number of people the trailer sleeps. Each listing also contains pictures of the trailer and a written description of its condition. Purchasing a trailer is handled by eBay, as you have the option to pay the seller with a PayPal account.