Model 725. Lots of them out there. I bought mine in February for $25. The seller drove more than 50 miles to deliver at that price. That model with the polished coffee can motor and orange stripe are nice looking.
Sounds like you got a great deal! A thing's intrinsic worth is based largely on what the highest bidder is willing to pay. I wonder what Jackson Pollock's dropcloth would go for !?
I had to Google "Jackson Polloch", as I had no idea who he was. Huh. Interesting stuff. Artwork is unique and personal. It's got to be hard to place a value on his work.