I just started mining. I bought an Antminer U1 (1.6GH/s) off Amazon. I think I paid around $60 which was more than I should have... I found some later for around $40... but it got my foot in the door and helped me to figure out how this stuff all works, or at least gave me the illusion of understanding! 
Once I got a little comfortable with it I bought a 5 blade BTC Garden Miner setup that runs at about 40GH/s total. I just got it up and running a few hours ago. I'm going to let that run for a few weeks to see if it measures out relatively close to the estimating calculators online. After that I plan on investing into several Antminer S1's that run at 180GH/s...
So far so good... Just trying to better understand how the luck works and the best way to manage my miners. But those little USB things is how I got started...
Brandon
Once I got a little comfortable with it I bought a 5 blade BTC Garden Miner setup that runs at about 40GH/s total. I just got it up and running a few hours ago. I'm going to let that run for a few weeks to see if it measures out relatively close to the estimating calculators online. After that I plan on investing into several Antminer S1's that run at 180GH/s...
So far so good... Just trying to better understand how the luck works and the best way to manage my miners. But those little USB things is how I got started...
Brandon