Did anyone think he might actually NEED a quote or a ballpark figure? Insurance, someone elses kite, ask mummy for the money etc etc.

having said that, pay what they ask, it's money well spent usually.
I've had two kite repairs from different places.
one was $115. it was a rip from LE to TE and a bit along the LE where it connects to the canopy.
the other was a V shaped tear about 70cm total. not running directly along a connecting surface. $80.
There's a good ball park figure for ya.