Great price for a quality piece of kit. I've had one for a while and find it very useful on my monopod.
Sold by Binoculars UK but fulfilled by Amazon
Next nearest price seem to be about £55, and as anyone who buys Manfrotto should know, it's hard stuff to find heavily reduced.
I realise that it probably won't be much use to many on here, but hopefully it helps someone out.
Don't be too put off by the 2.5kg max weight limit, I usually use it with about 3kg on top, it still locks up nicely and I have no qualms about throwing the whole lot over my shoulder.