While that is true, your offer is still misleading, considering the Blockeruptors...
You are free to simply NOT BUY THINGS YOU DO NOT FEEL ARE A GOOD VALUE. It's a whole lot easier than running around everywhere going "That's a bad deal! You'd be stupid to buy that! Don't buy that thing you want for a price you think is fair! I don't think it's a good deal!"
And, as noted, the FPGAs are actually useful for something after the end of their usefulness with bitcoin. The ASICs, should something happen to bitcoin, are simply scrap.
I like FPGAs and own some of them myself
The hashing power is an equivalent of 5 Ztex Boards. 840mh/s will yield 0.824BTC at current difficulty at 100% uptime.
I guess for around three months, we will see further 20% increases. So 0,6592 the second month, 0,5274 the third month, 0,421 the fourth. 2,4BTC in four months per device, considering that only Avalon ships its chips. If ASICminer, BFL and Avalon deliver, I have been undercalculating by a lot.
I am not meaning to bash you. But if you want to sell these HERE, then I would factor this in. If you want to make a FAT buck, sell them on ebay right now. This is going to be WAY better for you than selling here, since there are no naysayers that do their math.
The reason is the following: In Dollars or Euros, the buyer can speculate to win by the price. In BTC, he has to find that if current difficulty increases are to stay, he will never break even... He might break even through selling the new BTC for another price, but that is just as risky, simply adding the conversion fee to the price
I will also be honest: Comparing prices, I'd rather take your offer than the Blockeruptors, because the FPGAs are at least worth it and not having a 2000% premium...