I'm looking for a cost-effective GPS unit with USA maps on-board for a holiday we are planning. I don't really need a stand-alone GPS unit here in NZ.
I have seen these units on Trademe and I'm wondering if anyone has had any experience with them or knows anything about them:
http://www.trademe.co.nz/electronics-photography/gps/automotive/auction-442242192.htm
http://www.trademe.co.nz/electronics-photography/gps/automotive/auction-443879837.htm
Thanks