I don't know if Zara is having a sale in the US right now too, so maybe this is a long shot, but I wanted to tell you that I just bought some camis for €7.90 a piece (about $10).
They had at least 10 colours available and the quality is quite good. I bought two last Autumn and they have held up very well.
(Mango has nice camis as well by the way).