Many people want to buy Miners and ROI within 2 or 3 months, then dump them and buy new ones. That a way to do your mining and win a quick BTC, nothing wrong with that.
We can't compete with these large (Chinese) manufacturers, we know that. People who want a efficient, relaible, low power miner and mine with it for a long period have a great miner when they buy our YBF miner.
There's nothing to do with fast ROI 3-4 months
I ordered February 17, 2014 BitFuryStrikesBack 16 blades miner
BFSB M-board v3 (PCIe 1x style connectors) €99x1
Raspberry Pi Model B €35x1
BFSB H-card v2.2 (compatible with v3.0 M-board only) €295x16
Cart Subtotal: €4,854
Cart Discount:- €970,80
Shipping: Free Express Shipping
Order Total: €3,882.20
VAT Number: EE 101XXXXXXX
BitFuryStrikesBack 16 blades 500-550GH/s €3,882.20 +VAT
YBF 300+ GH/s Miner Set 300-380GH/s €651.75 +VAT 21%
YBF - six times cheaper and nearly two times slower if BitFuryStrikesBack.
Hash Rate has grown nearly six times.
Feb 17 2014 Bitcoin Difficulty: 3,129,573,175 Hash Rate 22,402,357 GH/s
Jul 17 2014 Bitcoin Difficulty: 17,336,316,979 Hash Rate 131,557,464 GH/s
Offer a fair price and I'll buy 5 sets.