EliteTUM:
I asked the seller and he gave me the following advice for wiring it all together:
MPU6050 breakoutboard Arduino MEGA 1280 VCC <-> 3V3 GND <-> GND SCL <-> ANALOG IN A5 SDA <-> ANALOG IN A4
That is wrong (it is the right answer for an Arduino Uno). One Arduino Mega1280 and Mega2560 the SCL is on pin 21 and the SDA is on pin 20.