Spotted these in Wickes today and i think for less then £20 it's a pretty good deal.
Just make sure you get all the fittings as advertised in the description because if they haven't got them they will supply you what is supposed to be included.
Might be useful for somebody.
The HT3420 Hose Trolley Kit is part of Kärcher's innovative range of hose trolleys which set new standards in functionality, design and quality. These state-of-the-art trolleys allow quick and easy unwinding and rewinding of hoses and take up the minimum of space. These can be used with all available click-on systems.
Height adjustable handle
Foldable space saving stowage
Includes 20m hose
Includes spray nozzle, 3 x connectors, 1 x connector with aqua stop
Trolley can fit a 40m hose