I have some Mk4 units for sale. They are a great upgrade to the Mk3 system. Every unit is tested, and firmware upgraded to either a ready made splash screen, or custom made for an extra £9.99. Latest 2014 Map DVD is also included. The cost is £300 + £20 p&p. Payment can be made via paypal gift or bank transfer, if you want to pay via paypal normally, you would need to pay for the fees.