RadioShack offers the Hubsan X4 RC Mini Quadcopter, model no. H107L, for $39.99. Sign up for their e-mail list (the field is at the bottom of the page) to receive a coupon for $10 off, dropping it to $29.99. With free shipping, that's the lowest total price we could find by $15. It features a precision 6-axis gyro, 4-channel 2.4Ghz control, two flight modes, and up to seven minutes of flight per charge.