[i_am_dead]

The main problem is that the waiting list is currently almost a year. If you order a miner today you won't see it until 2014.

[t0]

What about the ones on Ebay for $500-1000? If the breakeven is so good, why wouldn't those people just plug them in?

[maaku]

They probably are plugged in while the auction is going. But with each day the resale value decreases as well.