Walmart offers the refurbished Acer Aspire Intel Celeron Quad-Core 2GHz Desktop PC
, model no. AXC-603G-UW13, for $139
with free shipping
. That's among the best prices we've seen for a desktop PC with 4GB RAM and a 500GB hard drive with no rebate hassles. (It's a current low by $6 for a refurb, although we saw it for $9 less in May.) Features include an Intel Celeron J1900 2GHz Bay Trail quad-core processor, 4GB RAM, 500GB 7200 rpm hard drive, DVD burner, Gigabit Ethernet, HDMI, and Windows 8.1 64-bit.
Note: No warranty information is provided.