ribble 531 some advice please

[supermario]

hi there . this is my first post just getting into old race bikes. looking for my first one i have seen a ribble 531 i am going to see it tomo
just wanted to ask some advice on what i should look for and what price i should pay , and are these good bikes to start with .....

thanks for any help

hope i am posting in proper place none seems to care lol