Value of this system?

My brother in law built a extra gaming pc before the release of piledriver, with a fx 8150 to see the performance and is now looking to sell it. I have it posted on my local craigslist but no takers even with a lowered price to $550. What I'm wondering if the price is right or what should I be selling it for?

Specs:
FX 8150 (never oc'd)
ASUS Sabertooth 990fx R1.0
8gb 4x2Gb 1600 Kingston HyperX blu
Sapphire Radeon hd 6870 1Gb GDDR5
OCZ ModXStream 600watt 80+
Western Digital Blue 500gb Sata II 7200rpm
Raidmax Seiran Black/Red

Price includes a Cooler Master V6 GT without side panel fan or with just the stock cooler or an Antec Kuhler 620 for an extra $50. Also has a licensed windows 7 pro.

So is the current pricing fine or what is the value of it if I attempted to sell on ebay or something?
 
Solution
To be honest, that is about a $400 system.

Not a good PSU.
Poor quality case.
Bottom end 8xxx CPU.

The only thing worth much here is the motherboard.