i have to agree with some of the above comments yes .
if the car has been modified over the years to non self levelling then yes fitting a pair of normal standard shocks and cleaning /greasing the brake pipes would be doable at that quoted price (if not a little expensive ?)
BUT as said if your still on the factory self levelling system then id be asking what they are actually going to do ??
but aside all that -what and why are the shocks an advisory anyway .had they thought they seemed a little soft whilst maybee dropping into the brake test rollers ? or what .they dont do the corner bounce check anymore and you wouldnt spot a leaking shaft seal because of the air boot

marking brake pipes as "covered in grease or other material " is pretty standard anyway unless obviously rusty !