Frys.com has the Acer Aspire AXC-780-UR16 desktop PC with Intel Core i7-7700 3.6GHZ Kaby Lake, 4GB DDR4 RAM, 1TB 7200RPM HD for $549. Use $100 off promo code found in your e-mail inbox daily to bring it down to $449. Shipping is FREE. No sales tax too, and all sales tax are paid by Frys for most Core i7 desktops.
Also available for in-store pickup today if you have a Fry's retailer near you. You can also make this go 8GB RAM total by buying one 4GB DDR4 stick also available on Frys, Newegg, or eBay.
Cheers... This is 7 day sale.