Please man don't take this in the wrong way but ur prolly not Gunna get 400 shipped out of them. Even thou they were welded by big company's that u list, it's not really sayin much as far as they weld structure and continous reliablity goes. The tops of the pipes look good but each pipe being rewelded is Gunna hurt you with ur price. good luck with ur sale. Hope u don't take this the wrong way