Ben Nye is very hard to get in my country. The very few stores i found, online or real life, don't have the best selection, and their pictures are so great i'm still hesitating between shades of concealer (i did consult the brand's catalogue but it's not as helpful as you might think). I gave up ordering from US online stores mostly for the shipping costs, unless i was to buy more than a few products it just isn't worth the hassle.
Shiseido is sold in my country, but when i look at the products and their prices, they don't appear so interesting. I also want to stress it's not the same products you find in Japan, and i much prefer Shiseido's japanese lines of makeup compared to what i see at Sephora.
I don't know much Illamasqua, i'm pretty sure i would have to order it online.