3.91 and 3.55 741 Chunks w/ Auburn Suregrip

I've been searching for a clutch style 8 3/4 suregrip chunk in Arizona and these are the only two I've found that aren't sold before I get there. As the post reads they are Auburn style, both known to be woring.

Are these things worth $350 bucks?

http://phoenix.craigslist.org/search...minAsk=&maxAsk=