Unless this is an ironic post, I'll bite. Because I was reading about the history of stern this morning here.
http://www.pinballnews.com/comment/sterndesign.html
Seems cool, odd that they went to sports themes, but themes were pretty weird back then. Production numbers low. Value 350 to 750 probably.
Edit: Looks like the seller doesn't like their Scorpion cab. I swear, the day after you buy a game it's everywhere.