Did I made/making a mistake?

[miestas]

Ok,

  I just spend 689 USD for ~3.966 GH/s (in total) block erupters.
Also thinking to invest ~590 usd for 7 GH/s BitForce miner.
so total: ~1.2k usd for ~11 GH/s.
I have a place where electricity is free 4me.

First idea is just to `play a miner` and mine some coins.
If not bitcoins, then some other coins.

So did I made/making a mistake ?

[icem3lter]

Ok,

  I just spend 689 USD for ~3.966 GH/s (in total) block erupters.
Also thinking to invest ~590 usd for 7 GH/s BitForce miner.
so total: ~1.2k usd for ~11 GH/s.
I have a place where electricity is free 4me.

First idea is just to `play a miner` and mine some coins.
If not bitcoins, then some other coins.

So did I made/making a mistake ?

Wouldnt be better make research before buying ?
4 GH/s mine 0.0028 BTC ($3.40) daily at current difficulty

Because difficulty is increasing by about 25% every 2 weeks, you may get your 689 USD back only if Bitcoin price keeps increasing 

[LeafMiner]

Yes. You are going to spend years to recover what you paid. It is probably a better idea to sell them at a loss than mining for some years and take the same loss.

[Tributary]

That's quite an investment without knowing if it will pay off! 

I agree with LeafMiner, it might be better to dump the equipment soon before it really loses a lot of value. Selling them "new in box" before you use the block erupters might even mean you could sell them individually for near new price.

You could mine other altcoins, but it'd *really* be a gamble that they'd ever increase in value enough to make it worth it.

[miestas]

That's quite an investment without knowing if it will pay off! 

I agree with LeafMiner, it might be better to dump the equipment soon before it really loses a lot of value. Selling them "new in box" before you use the block erupters might even mean you could sell them individually for near new price.

You could mine other altcoins, but it'd *really* be a gamble that they'd ever increase in value enough to make it worth it.

Regarding, altcoins what are my best options ?

[Hobbit_]

You have to count - $ per 1GH/s is only price, wich you have to point to.

There are many items at any price, but with diferrent GH/s.

[Minnlo]

That's quite an investment without knowing if it will pay off! 

I agree with LeafMiner, it might be better to dump the equipment soon before it really loses a lot of value. Selling them "new in box" before you use the block erupters might even mean you could sell them individually for near new price.

You could mine other altcoins, but it'd *really* be a gamble that they'd ever increase in value enough to make it worth it.

Regarding, altcoins what are my best options ?

Yup, mine the alt-coins, and trade it back to bitcoin.