Battery Superstore via Amazon offers Prime members the Syma 3-Channel Gyroscope Remote-Controlled 7.5" Toy Helicopter in Green, model no. S107G, for $13.99 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $4.88.) That's tied with our mention from two weeks ago in another color as the lowest total price we've seen. (It's a current price low by $6.) It charges via USB (cable included) and flies for up to seven minutes per charge.