Amazon offers the KHE Equilibrium 2 20" Boys' BMX Bicycle, in Matte Black, model no. KH2018-1-BX, for $153.88 with free shipping. That's the lowest total price we could find by $76, outside of the mention below. It features a Hi-Ten steel frame, aluminum rims, steel rear u-brake, platform nylon pedals, Affix gyro system, and two pegs.

A close price: Walmart has it for $155.79 with free shipping.

Update: The price at Amazon has dropped to $150.64.