Originally Posted by kinderkram
And if you want to make it comfortable you could also order one of Paul's shields for the IMU.
Next step would be a GPS unit for 25$ (+Pauls GPS bob) and an ultrasonic sensor for 8$ if you want to try the MegaPirate:
You'll end up at ~250$ for the complete electronix!
I would love to buy the GPS unit, but I live in the Netherlands and the Ftech FMP04 GPS module from http://ohararp.com/products.html
is very cheap, but I have to pay $38 dollar for shipping!! Is there any other seller or other way to get this GPS device?