If you never see them then there is no real way to find a value. I agree with tigers... if its that rare and you want it just get it. I bought a Buccaneers football bag from 1979 and paid $100. I had never seen one before or since... who the heck knows what its "worth" so I may have overpaid but I don't care... its cool.

And how about posting a pic of the bottle... I'd like to see what it looks like.