I put in a header a month ago, and I got my old manifold sitting out in the shed. Should I try selling it on craigslist or ebay, how much would someone pay for one? Or should I just bring it to the dump and chuck it.....

 

Take it to your recylcling center. They will give you money for it.
EDZIT: I thought you were talking about your intake manifold.

 

Well nevermind just realized my dad threw it away already. Prolly wouldn't have gotten much for it anyway though....