That's an unreal bargain. $2500!!
It could be fixed with genuine parts for less than $500. Get an electric screen kit and it's as good as a late model ST13.
Don't be put off by the 101,000 kays. Mine has 118,000 and only ever had oil and filter changes. Have the valves checked for a hundred bucks if you must, but it won't change how well these engines run.
Some lucky punter is going to get a Candy Glory Red for a gift!