The big weigh in:

4 off 15 inch alloy wheels = £33 ( £1 per kg)
catalytic converter = £20
battery = £6
motors = £2.40 ( 20p per kg )
gearbox/compressor/mounts = £9.60 ( 20p per kg )
ali rads & pipes = £4 ( 50p per kg )
steel = £14.19 ( 11p per kg )

so a big total of £89.19 but it was an 18 mile round trip so I will have to deduct a couple of litres of diesel say £3.19 so the final total was £86