I've always gotten new from Mwave, but I won't buy from them anymore. I've noticed that they have really horrible packaging on their products. My mobo came in a FedEx box turned inside out and cut to the exact size of the mobo box with no padding or protection of any kind. The drives I last ordered were in a Microsoft bulk OEM software box with a little bubblewrap around the drives but about an inch of extra space all around so that the drives were rattling around inside the box and one came in damaged.
Outpost is an excellent online retailer. Good packaging. Excellent shipping. Their overnight shipping is cheaper than many places ground shipping and when they say overnight, they mean anything ordered before midnight is on your desk the next day, and they will even deliver on Saturday. No "processing" time before it ships, no worry about ordering before the 4:30 deadline or it takes on yet another day. With vendors like Newegg and Mwave, next day means ordering something overnight on Monday evening gets it to you hopefully by Wednesday and costs you $30 instead of $9.
Sorry about the rant. I've just had too many screwups with Mwave and Newegg. Unfortunately, Outpost doesn't carry as good a selection as they do. And they carry the GA-8IEXP, but not the raid version. So I'll shut up now.