Shocks and springs

Great opportunity for a suspension upgrade. I have just removed the suspension from my hillclimb X19 and offer it for sale. The shocks are adjustable and the springs are custom made with standard spring rate but 10 mm shorter. Both springs and shocks have covered less than 50 miles on the road and less than 50 miles on the track. How good are they? In the 2015 HSA Hillclimb Championship I competed in the production class and set class track records at Shelsley Walsh and Gurston Down. The results were down to the grip and handling and not power as I was using a standard engine and gearbox. Also included are the top suspension mounts that were new and fitted at the same time as the shocks. The shocks cost over £650 and the springs were £150. I will accept an offer over £500. I will attach photos of the parts plus 1 of the car on track with the suspension fitted.