Thank you for your reply. The $5,000 also include a 2005 Mercury 25hp, a good quality trailer, all the necessary safety gear, two covers, a storage seat, high-pressure pump with autoset, and some other goodies, so I think it's a decent deal.
I just want to understand a bit better what exactly the damage I'm seeing is. Actually, I looked at the zodiac FC-470 you mentioned, and there is a photo I could probably use.
Not a RIB, but definitely my baby.