Seatbelt replacements - Expensive?

[T84]

Hey guys,

My car's in the mechanics at the moment having a service and some things fixed, they've told me that the drivers seatbelt is frayed and needs a replacement, and that the replacement will be £80 + fitting.

This sound reasonable to you? I have no idea how much seatbelts cost but it's not something I want to mess around with and 'do on the cheap'.

Thanks