Price: £34.00
A couple of pieces of properly esoteric and ridiculously ultralight gear here:
I have a Snap Cyclops single rope belay device for sale. For photos and more info, see http://www.verticalmuseum.com/VerticalDevicesPage/Belay/SlotBlockPages/Slot...
It has the distinction of possibly being the world's lightest commercially made belay device at a paltry 32 grammes on my scales!
Anyway, probably one for the collector/enthusiast or the completely weight obsessed...
£20 posted
In the same vein, I also have a Metolius Feather nut key for sale. Slightly more common and possibly the world's lightest nut key at 21 grammes. See https://www.outdoorgearlab.com/reviews/climbing/nut-tool/metolius-feather
£14 posted
Post edited at 22:03