LOL "liquid cooled cpu and gpu. never gets above room temp inside." This is the wrong place to try and fool people as you know as well as I that it's impossible to get sub ambient temps on standard water-cooling.
And it's read/write speeds..not up/down; that applies for networking.
With all due respect, I wouldn't exactly list this as top-of-the-line either; The components used in this are 1-2 and even 3 generations old.
Just a quick thought: it not that bashing only happens here, this is just the only place that doesn't have strict rules against it. I daily check 4 sites buy/sell areas, any when I see some of the prices people ask, I either don't bother or give the s huge dose of misguided positive sarcasm. Here we can just call a spade a spade.
However, your prices are pretty good for the used, but still high end parts. But for the money, a similar sb or ib system can be had. I would seriously entertain parting out because of this.