Man, I don't think I've paid less than $19 for a t-shirt in years, except QC-shirts and a t-shirt from T-Shirt Hell (but I had to pay shipping, so it's still more in total), so for me, AA is cheap, even the EU-store.
I think the item I spend more money than I would need on is food, but I'm a student, so that also limits itself, sort of naturally.. If I had more money, though, my spending habits would probably be baaad.. I'd get better sheets, a better duvet, more expensive clothing (at least if I could manage to lose some weight) etc..