There is a cb550/four sitting in yard near my home which I think would make a nice cafe. I was wondering if anyone here knows how much such a bike should go for? From what I can tell by looking at it from a distance and some internet research I think it is a '76 but I can't tell if it is a K or an F. It is brown & has 4into1 pipes. According to the internet only the 76 K came in brown however it had 4into4 pipes. The F had the 4into1 but didn't come in brown. I also read that apart from the pipes, the only difference between the k & r is cosmetic, no performance difference. Is this true? I am going to try to get ahold of the owner next week to get a better look & find out if it runs. (The plates show an expiration of 91) Hopefully he will let it go for a good price. I would like to know what these bike typically go for. Thanks.