Bongman - I have ordered hundreds of £ worth, and im sure other people have. It's cheap because its direct, and its cheap because most people don't declare it and thus do not pay duty/VAT (granted most of my purchases are small bits here and there).
Just so you know the T6 isn't a Magicshine, its a clone (the Magicshine bieng a clone of the Lupine Tesla)
. It has a different connector to the Magicshine group so make sure you check when you buy new batteries etc.
I have returned things to, you do get a 180 day "they pay for return" warranty (if its cheap they just refund or replace). Sites like this are good for tinkerers that are able to fix minor problems as sometimes the finishing can be a bit lax.
MJ808 all the way, £45-50. Order now if you want from China, as the christmas rush starts very soon. Add on 10-15 quid if you order from a UK stockist.
There are cheaper versions out now, with P7 and other LEDS, but apparently use a different connector.*
Magicshines brightest light so far is the MJ872 which costs around £100 and is "1600" lumens. (these are mostly overated, so are local lights, but do serve as a rough comparison)
You can pay loads more for a light, that might be more reliable - but that or a warranty doesn't help you in the dark.
So - always run/carry 2 lights, maybe a cheap named manufacter/reliable - a Smart 35 Lux? - as a backup/to be seen light, and a bright cheap knock off light from china for your main running light.
*I even have the MJ818 3W rear light, which uses the same connector as the 808 etc so you can use a Y cable on a single battery if you wish.