Is this the same for other Cryptocurrencys?

700USD http://www.amazon.com/Antminer-~4-73TH-25W-Bitcoin-Miner/dp/B014OGCP6W

Im looking for Miner specs, since I have access to pc distributors, I may create my own server if I find it worth it. So far seems worth it. But Im not fully gasping the concept of mining bitcoins yet.

I have "free" electricity.