Walmart offers the Boss Audio In-Dash Car Stereo, model no. 612UA, for $25. (Amazon charges the same for Prime members.) Opt for in-store pickup to dodge the $4.97 shipping fee. That's a buck under our January mention and the lowest price we could find by $9. This 200-watt stereo features four channels, an AM/FM receiver, 3.5mm input, USB port, SD card slot, backlit controls, clock, and 2-channel RCA outputs. (It doesn't include a CD player.)