The cost, RRP ,in the states for a 450Maxx D is $18,695 dollars. Which equates to £9839. In this country it comes out at £13,995.
Deliverey equates to around £1200
Vat you will pay on both.
Import Duties. I once spoke to a T/M salesman who said "oh import duties will cripple you, and it won't work out that cheap". I heard the same story when I bought a car in Holland. I checked with HM Customs & Excise, and they tell me that machinery of this type has a duty of 1.7%.
That then works out at £11226. There is an even grater saving to be had on hoses and reel. eg 50' of hose comes out at about £42. Here it's £100.
The problem will be getting an independant to supply. Steambrite who do T/M's will do it, but don't do a diesel.
If you take a look at some sites in the US there are some major differences in price