Mining-hardware fantasy-prices and not available?

Hi,

I am really new to bitcoin, but read a lot the last days, but I still don't know how it comes to those extreme differences in mining hardware.

AFAIK ASIC ist the best hardware for hashing now , but why are there soo many difference in pricing and why isn't anything available?

To start mining with profit you have to buy some decent hardware. ok!
But what I've found so far is the following equipment with the following prices:

Blackarrow: 100 GH/s - 350$ (only chip?)
Technobit: 40 GH/s - 750€
Blackarrow: 160 GH/s - 2,499$
Hashfast: 400 GH/s - 2.250$
BFL: 600 GH/s - 4.680$
KnCminer: 550 GH/s - 4.995$
BFL: 500 GH/s - 22.484$ (FFS?)

Ebay (Block Erupter Blades) 10 GH/s 800€

So why is there so a HUUUGE difference on all of these models? Why should anyone buy a Block Erupter or Technobit or Blackarrows instead of Hashfast (which everyone seems to be doing when checking the availability)

And why do the ALL deliver 2014, Q1-2?

Maybe someone can enlighten me

Ps: I guess its worthless to buy single Block Erupter?

Topic: Mining-hardware fantasy-prices and not available? (Read 478 times)