FYI, I ordered the Ron Jones box from SAE and had it shipped to Belgium without having to pay any import duty. In fact, I've never had to pay any import duty on SAE orders.
I'd say go for it. The box is worth it.
For the UK, the rules are that anything over £18 from outside the EU will face an import duty. Before I was aware of this I ordered something from Amazon Japan that was about £50. I can't recall the exact duty but I had to pay another further £25ish at the post office before I could collect it. Obviously this was already a luxury purchase and this made me feel even more guilty and skint!
Luckily for me La-La Land 'conveniently forget' to declare the value of their packages, so so far I am yet to be caught out buying their releases. I hope I haven't just jinxed it!