The cheapest flatbed trailers available are the 2015 Texas Bragg, 2014 Road Boss and 2015 American Trailers model, based on listings at CommercialTruckTrader.com. All three trailers are available in new condition for under $2,000, well under the site's average flatbed trailer price of $13,231.
Other flatbed trailer models available at Commercial Truck Trader for less than $3,500 include the 2015 Triple Crown, 2015 Eagle, 2015 Anderson 3T Series, 2015 Big Tex and the 2014 Liberty.
Flatbed trailers are also for sale on TruckPaper.com, though prices are higher than Commercial Truck Trader listings. The cheapest flatbed trailer brands at Truck Paper are 2014 and 2015 PJ brand trailers along with a 2015 Tilt GN model, all of which are available for under $6,000.