Erm, go to newegg.com and price those parts, then cut off about 30% of the price since its used. If not cut about 10% if you already own it and just want a new PC. Add it up add a few bucks here and there and puff. I want to say 1,500 but this is a really wide guess.
The Mobo can do upto 16gigs of ram and it has sata 3.0 gb/s speeds (aka: sata II) and can do a raid configuration
SATA II and 3.0 Gb/s is not the same.