From the photo I see braded steel brake line, tidy tied rev counter cable, new MC cap, the seat has been nicely reapolstered, ( usually the 72 seat looks flat even a good one), with the rest of the bike well turned out.
Some questions I would b asking are,
Has the charging system had work done to it....check bike charging with a voltmeter while running.
What has been done to the wiring and bar switches.
What was done to the engine. Was the front cam chain guide replaced when the work was done,
Judging from the pic I think any work done would have been done well, not guaranteed but...... the answer to the questions will confirm or deny.
Mileage, if the top end has been done, is nothing. If looked after these cranks can take 3 top end rebuilds before they need to be rebuilt themselves, and as Marty states some of these bikes have done big mileages before the first top end rebuild.
If a reasonable price is on it, you feel he is genuine and questions answered satisfactorily, ......well there is always a chance things, or the decision could be wrong but ......imagine if it all comes together