Here is an original one to compare against:
http://www.scomo.net/product_info.php/products_id/5243
Problems:
The holes in the legshield for that big chrome thing.
The left leg of the center stand is in the air.
The horn looks off, but horns are cheap.
And it's from a motorcycle dealer.
I would say it's an okay deal. Have you seen what Frank has in Elmhurst? He posts on Chicago Craigslist all the time. I got my GL from him. His prices for what he has are a little high, but you might be able to negotiate, and he is more honest and knowledgeable than Arlington Motorsports, I imagine--I haven't dealt with them.
You could probably get a Chicago scooterist to go check it out with you and make sure it is what it is.