Looking for a used one? Check for rust in the tank, check the date code on the tires (many owners put on cheap rubber), and ensure the electric starter works cold. If it does, ride it into the sunset.
It looks expensive. It feels solid. And unlike many modern "retro" bikes that look like appliances, the Estrella actually looks like it belongs in a black-and-white photograph. kawasaki+estrella+250+review