I'm guessing you got burnt buying an auction of EHSP that only had one charge remaining. I did the same thing last night and while I realize the number is visible in the auction, it can be easy to overlook when you are in a rush.
I realize currants are easy to come by, but really is it worth the hit to your self-esteem to grab a few easy currants?
Some sort of extra reminder would be nice. I've almost managed to overlook the number more times than I can count. And the auctions usually aren't cheap enough to tell they're low on uses.