A best bet is the Lenovo IdeaCentre H430 Intel Core i3 3.3GHz Desktop PC (pictured), model no. 25581ZU, for $279.99 after coupon with free shipping. That's tied with our mention from three weeks ago and the best price we've seen for a new Core i3 desktop PC. Features include an Intel Core i3-2120 3.3GHz Sandy Bridge dual-core processor, 4GB RAM, 1TB hard drive, DVD burner, Gigabit Ethernet, and Windows 7 Home Premium 64-bit. Deal ends August 25.
Of note, the same discount can be redeemed in-store via this printable coupon.