In recent weeks I have been speaking to a colleague in Scotland. He imported a known brand from the US which had UK spec motors. He saved, after duty, taxes, shipping about £300. (This machine doesn't have a great reputation for reliability in the UK)
Within a few weeks, it broke down. Parts were eventually sent from the US, they were installed and it worked fine again.
A few weeks later, another breakdown. He is now trying to get a refund and it looks like he'll have to pay the shipping to return the machine to the supplier.
In all, this "cheap machine" will have cost more than the UK list price. He is not looking outside a UK supplier for the replacement.
If you are a gambling man/woman, then by all means try a personal import. You know the risks. A few hundred pounds saved today may not look as attractive in the next month or two. I personally don't feel that the savings on a relatively low cost piece of equipment justify the risks. A high spec T/M perhaps.
Safe and happy cleaning

Ken