I am not a Pinarello expert, but from what you can see in the pics it looks to be about an 83/84. I believe that Pinarello went to a sloping fork crown in 85 and it has a braze-on front derailleur hanger which appeared in around 83(?).

As far as what to look for: good chrome, no flaking or rust: frame is straight and true, no dings or dents.

I like it and it seems like a fair price, Decals are readily available and that red is fairly easy to touch up if you don't want to do a full repaint. Pinarello are sort of an overlooked marque and so they are kind of a bargain, they ride nice and are often commented to be a favourite ride even by owners who have a large collection of vintage/classic bikes.

Buy it!

vjp