I have a tube that turns out to be too short for my purposes. It is already primed white on the exterior, and has had the plastic coating removed from the inside. It is 1/4" thick. It was manufactured as a concrete form by a company called Brock White. I paid about $45 for it, and hope to get whatever someone is willing to pay up to that price, even if that means getting nothing (in other words, it could be free).
I live in Maple Plain, Minnesota and have no desire to ship this large item.