Walmart offers the RCA 16GB 7" Quad-Core Android Tablet in four colors (Charcoal pictured), model no. RCT6773W42BF C, for $39.99 with free shipping. That's $15 off list, $5 under our mention from three days ago, and a very low price for a 16GB 7" quad-core Android tablet. It features a 7" display, 1.3GHz quad-core processor, WiFi, microUSB, and Android 5.0 OS (Lollipop).