Dell Home offers the Dell Inspiron 3000 Series Intel Haswell Core i5 3.1GHz Small Desktop PC for $549.99 with free shipping. That's $130 off list and the lowest total price we could find for this form factor with a Core i5 CPU. It features an Intel Core i5-4440 3.1GHz Haswell quad-core processor, 8GB RAM, 1TB 7200 rpm hard drive, DVD burner, 802.11n wireless, Bluetooth 4.0, USB 3.0, and Windows 8.1 64-bit.
Before you spend another dollar on items and services like these, check with your public library. You will likely be surprised by what it offers for free.