550.00 is high for that , it looks like a 72 .. I agree with smallbikes about 400.00 the title makes it worth more since almost none of them ever had them ,, New they came with a Certificate of Origin that most never went and got the title with ,, The Bike looks complete so that is a plus , The one thing about a CT70 is its resale , I have had many and always get a good price when I sell ,, They run and ride nice also ,,, always worth the work to get back on the trail or street ,, I will also say that even though it is street legal they really dont go fast enough to get out in traffic with , I had a ST90 I tried to ride on the street , it would cruise around 45 and I still was getting run over by traffic ,, Think about it , if the speed limit is 35 ,, who really goes that fast in a car ,,, If this guy wont deal with you there is always another one just keep looking , I agree with the Lifan engine swap too , find a roller and just install a new engine , I had a 88cc kit in a 50cc lifan in my 73 ct70 that thing would do easy wheelies , think what it would do with a 140 or 125 .. anyway my two cents