That's a great piece at a killer price. I think your issue with selling it is that most people who screw with slants don't have the style of carb it is modified for sitting on their shelves. I would almost guarantee, if you supplied a core carb with that manifold, it would sell for $150 within a day or two. I flip stock manifolds with carb cores all the time in that price range, and have yet to sit one one for more than a week or two. Good luck with it.