outside door handle stuck

[Sbjkmtce]

Hi guys, my driver door can't open from the outside. The mechanic quoted me New Zealand dollar $635 (equal US$550) to get it fixed. He said $250 for part and the rest is 3 hrs labour plus 15% tax. The labour here is between $60-80 per hr. People are expected to pay more when dealing with European cars. By doing the math, $250 + $240 ($80 x 3 hrs) =$490+15%gst tax = $563, he is overcharging me for 100 buck.
Anyway, the living expenses here is far more than living expenses in US.
My question is does he need 3 hrs to get it fixed?