Well really a Bike Workstand, but at thirty quid it works really well for unicycles and especially my Giraffe. (Also useful for my mountain bike!)
Link here: http://www.lidl.co.uk/cps/rde/xchg/lidl_uk/hs.xsl/index_32414.htm
Nasher
Thanks Nasher 
There’s some good stuff there! and at a good price. I might get some gloves, glasses, lock, …
cheers 
I just bought this tubular bike work stand
It’s awesome, Works great, no need to spend $200 on a park.
Looks very similar to the Lidl one - makes lots of jobs much easier
My workstand is a length of webbing hanging from a rafter. 