Walmart offers the Apex Power Tower, model no. TC1800, for $83.42 with free shipping. That's $2 under yesterday's mention and the lowest total price we've seen. (It's a current low of $19.) It features a knee raise and dip station, ergonomically angled VKR pads, dip handles, and wide chin up hand position.

Update: The price has increased to $84.21 returned to $83.37.