$160 please.!  I saw what he did,  he replaced a couple of fuses under the playfield..  

$160, reasonable. People really do not value other people's time.

Takes it back to the point about honesty. The tech should not have falsely claimed it was 20 minutes work, when it was really 5 minutes. He should have said it is a $150 callout fee, including upto 30 minutes repair time, plus materials.  Then you would not feel cheated being charged $160.

Honesty would also include showing the owner what work was done.  The owner would probably the call back the same tech for future more difficult repairs, instead of feeling cheated and going to someone else in the future.

..Hey 'Rowan' are you still there? (Rowan started this thread)