Walmart offers the Merax Finiss 21-Speed 26" Magnesium Alloy Wheel Mountain Bike in Green, model no. MS008700JAA, for $200.91 with free shipping. That's $99 under our July mention and the lowest total price we've seen. (It's the best deal today by $99.) It features Shimano front and rear derailleurs, mechanical disc brakes, Shimano shifters, aluminum frame, and magnesium alloy wheels.