Walmart has Razor MX350 24V Dirt Rocket Electric Ride on Motocross Bike (Pink) for $148. Shipping is free.
Features: 350 watt electrical motor24V (two 12V) sealed lead acid batteryBattery charge time: 12 hoursUp to 30 minutes of continuous use / Up to 7 miles on a single chargeUL approved chargerAssembled Dimensions: 44 x 24.5 x 31 inchesWeight: 70.25 poundsWeight Limit: 140 poundsAuthentic motocross frame geometryHigh-torque, rear-wheel chain-drive14 mph (22 km/h)Features adjustable-angle, riser-style handlebars, spoked wheels with 12″ pneumatic, knobby tires, retractable kickstand, and hand-operated rear brake