AT 13G you get about 0.43 BTC/day, it will take you 102 days to break even assuming difficulty stays the same.
That's about the same as most other mining tools' market price.
Yeah, because nobody is selling ready made miners to a price that allows ROI. If they have the hardware, either they mine the hell out of it or they sell it at a price they won't get mining by themselves. Otherwise it would be a bad business decision, right?