Is it legal to sell a used mattress?

Of course it's legal to sell a used mattress! Depending on where you sell it and who you sell it to. What I mean buy that is you couldn't sell it legally in the black market and you can't sell a used mattress and tell the buyer that its a new one. But it would be fine if you were selling on Ebay, to a neighbour or friend etc Provided you do it in a legal way AND let the buyer know for sure that its been used, then it should be fine.