I seem to remember reading on the Tactics website that the item may be subjected to customs, tariffs, VAT, sales tax, or general brokerage fees, which they aren't responsible for. I.e you will have to pay taxes on it when it comes through, and these costs are your responsibility. I decided it would be easier to simply buy one from England. I bought from ss20.com but theboardbasement.com had some decent stuff too. If you look around, you can find some decent deals.
There's also a website called idealo.co.uk which you can search for an item, and it'll find all the offers for them. Decent website.