600 Fazer for my Father in Law, opinions please.

[Deefer666]

My bike is 14yrs old and still appears to have original brake lines. No issues! I just bled them after 'servicing' the calipers all round and they are plenty firm with loads of feedback.

Aftermarket bars and can - I'm probably wrong (most of the time), as these are common modifications, but it would be worth looking for evidence it's been dropped or down the road, original engine covers? levers, pegs? etc

Rubber brake lines are reckoned to have a "use life" of 5-6 years" after that they start to degrade and are generally reckoned to be due for replacement by 8 years max. Obviously this is generalisation as it does not take into consideration the use the brakes have had and while you think that your brakes are fine and they probably feel fine because the degradation is a slow process that if you were to replace the hoses you would feel how much performance you were losing. This is why when people fit braided hoses they always reckon that they are so much better than rubber hoses, this is not true its just that the rubber hoses were probably past their best.

As for the aftermarket bars and lack on bar ends, I only pointed it out because Jan/Feb are really a buyers market if you have cash and its one more thing to use to attempt to beat the dealer down in price.