They should allow you to buy it now on the future value of the bit coins it will produce.
I think someone estimated that it could mine $0.20 per day. But I am not sure. $0.20 per day would mean it would pay itself off after 5.5 years if difficulty and price didn't change, and not considering electricity. It would be kind of awesome to buy one, and then plot its ROI over time. I'd like to hook one up to a solar panel or a windmill or waterwheel.
wait wait wait. I was going to start looking at exactly that and was trying to figure out how big of a line lump it's got. Looks a lot like a 18V/1.2A but you'd want to know, you know? So then I checked their page and they've got fuckall for specs. So I got on the Internetz and Holy Shit it's just a fuckin' RaspPi. I'll let the Engadget comments speak for me here, which should communicate my level of scorn: 128 GB Class 10 SD Card: $70 USB WiFi Adapter: $10 Micro USB Power Supply: $8 ------------------------------ Total: $123 This Device: $399 ?????????? I mean, OK they have a special chip and a fan bolted on there. But really?Raspberry Pi: $35