I'm not sure how many are in stock but I just bought one and there are still more available.
Click here [dell.com]
for the listings of refurbed XPS 8930 desktops and look for the $812.99 option.
The coupon code XPSLD15a will take 15% off, lowering the price to $691.04 plus tax. Visit your favorite cashback click-through site first for additional savings, I used one that provides an additional 5% cashback so that essentially takes care of the sales tax for me.