The photo is from 1980, and an excellent one !
It's hard to say what these kinds of pictures would be worth, but maybe it could get 20 or 30 bucks at an auction. If the photographer were famous (and dead), it would be worth a lot more. Either way, it's still a great photo, pro gear or not. Probably just from a few rows back.
"The more generous you are with your music, the more it comes back to you." -- Dan Lampinskihttp://www.queenlive.ca