Yeah, it's crazy. I watched 38Gh/s miners go for $500+ on ebay. That's more than $12 per Gh. People buying like that are what's making the price go up. A Gh is not worth more than $3.
Praytell, where can I buy mining hardware for less than $3/Ghash?
Assume I don't want to budget more than $1000.
I would also comment that these devices on e-bay are "in hand", meaning they may ship in less than "two weeks".
I don't think there is such a miner. Maybe if you buy second hand, don't pay VAT and the miner eats incredible amounts of electricity. And you get it next winter.