The Karcher K2 Full Control Pressure Washer, 1400W, 110 Bar is
currently available for £99.99 at Argos eBay:

https://www.ebay.co.uk/itm/332069834811

But is it a decent machine? I know you can spend ten times that if you
want to but all I'll be using it for will be to snow foam the car and
clean the patio, so is it OK for that?