Advice: take a force4 catalogue with you, some new things there are not or only slightly cheaper, and your chance of being able to return if faulty at the Jumble / to that seller is a pain in the rear!!!! Beware!
But for used stuff and crap it is great!!!
Best thing I got was a spare trailer wheel for a friends run to tip trailer and Charlie A found a matching seat for his Shetland, what are the chances!!