I thought this was a good price for a basic bluetooth GPS (no software bundled). I've just ordered one to go with my s60 phone. Seems it should work okay with Google Maps and Nokia Maps, according to the Expansys forum/support pages.
Compact lightweight Bluetooth GPS receiver, perfect for turning your smart phone into a fully functioning satellite navigation system.
The Siraya Bluetooth GPS Receiver connects wirelessly to your Bluetooth enabled smart phone and works in conjunction with popular satellite navigation software to provide instant navigation. The low power chip set allows the Siraya Bluetooth GPS receiver to continuous operation for up to 10 hours. 12 channel satellite tracking lets you acquire acquire a satellite lock rapidly with extended accuracy.
The include car charger lets you keep your Siraya Bluetooth GPS Receiver charged in the car. An MMCX adapter allows connection to external antennas.