Sparkfun's Inventor's Kit. SparkFun Inventor's Kit for Arduino with Retail Case - RTL-10339 - SparkFun Electronics
Adafruit's Starter Pack. Adafruit Metro 328 Starter Pack : ID 68 : $44.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Adafruit's ARDX. Adafruit MetroX Classic Kit - Experimentation Kit for Metro 328 : ID 170 : $84.95 : Adafruit Industries, Unique & fun DIY electronics and kits