They just aren't pulling in much at the current difficult compared to electricity costs.
You answered your own question then - if your cards are losing money you either have to speculate on ASICs or pack it in. If you want definite delivery, see:
http://www.ebay.com/itm/221220586726wow that is amazing!
I have often thought of seeing what I could get for my September pre-order if I posted a screen with my order number.