I have the opportunity to buy a set of vintage twin 38 steel tanks with manifold. The shipping to get them to me in Hawaii will be high, and I will probably resell them eventually. (I am a "catch and release" vintage scuba collector) They are not currently hydro'd or visualed. I've heard they are rare and hard to find these days, and I'd buy them if they could resold later for at least what I pay for them including shipping. I think they look very cool.