Some old Sears bicycle I picked up from a flea market. I am just looking for some information. Is it possible to tell when it was made? Is this bicycle worth renovating? Are 3 speeds like this hard to convert to fixie single speeds? It has a great deal of rust over everything which can rust, the brakes don't function correctly, shifting is tricky, and the rear rim appears slightly bent when spun.

Thanks for any help ^_^