I bid on one now cancelled.
How to find a good one?
Milage is a problem but servicing and the way the bike has been ridden would be one of my concerns -
Some models are proved to be better than others mainly due to continuous development.
I understand the last of the XB12 models post 2008 had a bigger crank pin? and other improvements.
Screamer http://www.badweatherbikers.com/buell/m ... 1515158964
2008 and later XB engines have larger crank pins and the bottom end will typically- --- live much longer than the previous model years. Top end life is generally the same.
As mentioned before, maintenance and riding style are probably the most important factors on engine life.