Camera inspection Chimney Flue

[Tiffers1]

Can anyone help with how much a camera inspection of our Rayburn flue should cost? we are being told £350 which for 30 minutes work seems rather steep!

Oof, that seems like loads.

Why does it need inspecting? Is it leaking? If you aren't careful, by the time you've paid for an inspection and the repair, you might have put in a new flue!

Already had it lined, it's a rayburn but house reeks when we light it. Been fully serviced etc and engineer says it's not drawing well