I am jealous of the people in SoCal that will eventually get some nice pipes for their 350.
I'm a long ways away and, recently, I was able to get some decent header pipes for my 350. (Not as nice as yours but not as bad as some of the stuff one can see on ebay).
I suspect you'll not have too much trouble selling yours at that price. I paid $130 for me header pipes. You have the who system & they look really good considering how old they are.