Vintage T-Shirt Forum & Community Authentication Appraisals

Hi
I acquired this AC/DC shirt from a family member, so I know its authentic. My questions are -what is it worth-I dont see any listings completed or not on ebay...also note it has a couple areas of small rust type stains-below & to right of missile flame, & just to left of the dripping drool...advice on cleaning? better left alone?

Thanks!

I'd price it at $75 with offers.

Rust - here you go:

http://www.defunkd.com/blog/2009/02/18/ ... val-guide/

Thanks very much!