It isn't and every one of you posting this is wrong.
I have bought batch one S3's
I will profit with them
If you can't I don't really know what to say.
S1 owners like phillip (see above) took a chance and got lucky due to KNC, BFL, BA and others delivering late. I have free electricity and I was still skeptical about ROI. Considering all that late stuff is now delivering, I'll make a 1BTC bet with you that your S3 won't ROI it's BTC costs. With the 25% jump this last period it's going to get nasty pretty quick.
Btc roi is really soooo hard to do. I no longer make bets but I would think that to get a s-3 to return its cost of .75btc is not going to happen for most of us.
USD roi is always possible. Now many say but if you purchased the 0.75btc and held it 1 year later that was a better profit.
Yes it is true that buying low and selling high may make more money. But I am a USA guy I follow USA rules.
Buying coins and holding them is passive investing as per USA tax law.
Buying a miner mining with it and then selling it on ebay involves up to three types of tax rules.
1) mining which is an active business
2) resale on ebay I have an active ebay store
3) holding the mined coins . which is about the same as buy and hold tax law wise.
Many forum members are fully underground. So they have different condtitions to consider then me.