If they were used they may failed and they have tossed them. They are low quality, I suspect they will cost more then the much better ones available at any sporting goods store. A friend tried mine 1 night and choose to sleep on the floor. It was flat way before morning. At home I than filled it with air and tried to fix the leaks. I gave up.
2013 24RKSWE (27ft TT) Cougar 1/2 ton series
2013 Ford F350 4x4 CC 6.7 engine, 8 ft bed 3.55 rear end lariat package
Retired from Oregon State Police in 2011 than worked another 9.5 years as a small town traffic cop:
As of 05-2020, I am all done with 39 years total police work. No more uniforms for me.