I was thinking along the same lines as you SlimRider. I plan on stopping in on Monday and offering $100 for the bike with $125 being my top offer.
As for the authenticity of the bike, I have known the seller long enough to know that he is giving me the straight scoop. Also, the little research that I have done on the internet shows that Schwinn at that time relocated their headquarters to Boulder(not that the bike was made there) thus explaining the sticker. Just looking at it also tells me that the styling is not consistent with the modern big box Sidewinder.
Thanks to everyone who has replied to my original post. It is nice to have a place where a person who is just getting back into riding at the age of 49 can get some guidance from people that are a little more in tune with the sport. If I end up getting the Sidewinder for my daughter I will be sure to post back and let everyone know how it turns out.
Thanks
Gary