There are plenty of places in other European countries which will ship stuff to the UK and some are cheaper than shops here.
Bear in mind though, that if it goes wrong, you'll have to send it back to them. That means you could be without it for quite a long time while it's being fixed and shipped back. And phone calls to chase your lost equipment will be more expensive.
Buying from the US always looks tempting - everything is so much cheaper over there! Bear in mind that you'll have to add international shipping and import tax to the basic price.
Also, remember that the country you buy from could use different mains voltage to the UK . Some items will work without you having to do anything but don't assume this. Make sure you check carefully with the manufacturer before you plug anything in. For some equipment, changing the voltage over can be a simple matter of flipping a switch on the back of the machine. Other equipment will need a whole new power supply. That will add to the cost so check with the manufacturer before you order.