ASIC miners are popping up on Ebay and Craigslist like crazy. Most of them claim its a hot item that we can't buy today from the vendor and the machine will make you rich.
Many of the listing shows, they just received the unit a few days ago or the same day from BFL and others.
If the machines are making that much bitcoins, why are they selling them so fast? I don't think they made their ROI in just a few days.
Its because difficulty is going up too fast, ASIC just won't ROI any more....