Declaring this, I'm aware it put's me in the que for a show like What not to wear (where Mica Paris will tell me mature women don't do punk), but for 10 years or so, my favorite eyeshadow has been a turquoise from HM. The cheapest of the cheap at $1.8 á piece, more vibrant and pigmented than any you could find elsewhere. I don't know how many of these I picked up and send to my friends in States and the UK, but it wouldn't surprise me if I was the biggest customer in my town.
Of course, it was discontinued ages ago and when my beloved kid found my beloved (unused, saved for later) eyeshadow stash and played dress-up with it, I was less than happy. So, when I found it and some of it's siblings online, I was ecstatic. Let's hoard eyeshadow like there's no tomorrow, or rather, like I'll be around for the next 300 years!
I feel cheated. Not financially as they are still dirt-cheap, but cheated of my dream of being able to wear the same color I wore when I was young and un-hip.