are these good quotes?

[JLawson90]

so I have a rear offside ABS sensor error on my 2011 estate .. garage has quote 85 quid to supply and replace the part, reasonable or not?

Also, I have a knock which is coming from the front ARB links .. again I'm wondering if the 70 they've quoted to supply and fit replacements is a good price or not?

also.. are either of these easy enough to do by the side of the road? I'm handy with my tools but have no lift, so not sure whether taking these on just on axle stands would be biting off too much?

I can get a pair of 'starline' arb links from ECP for £26 so if I could do these myself would save a decent amount of money