I have a PTK and it’s a decent chassis. The CR80 is a good ride but they aren’t very popular. Around here you wouldn’t be able to find a race but for track days no problem. The price seems a little high for a CR80 kart. My opinion is based on average condition with out front brakes. If it’s very clean and well maintained it’s probably a good deal. If it has front brakes better yet with them if you decide to go up to a 125 in the future you can with that chassis.
Brian