Amazon currently have the Core125 £84.99 If you need a snow foam lance for the car Euro Car parts recently had a great deal on the Nilfisk AutoBrite lance with an included bottle of snow foam. It really depends what you're using it for, I have the Core 125 and it does me; I've use it on everything from my car to the wood tables and chairs in the garden; great for the patio too.
Also how would this compare to the C110 advertised from cleanstore?
Is this also from Costco?
Buy the core 125 and get better 3rd party accessories with the money you save.