StackSocial offers the Jamstik Wireless Smart Guitar for iOS, model no. JSI142100, for $149.99. Coupon code "SAVE15" drops it to $134.99. With free shipping, that's $15 under our November mention and the lowest total price we've seen. (It's the best deal now by $75.) This smart guitar is compatible with Apple devices and includes three apps: jamStik Connect, jamTutor, and jamMix. Deal ends January 18.