Based on price comparisons of the Streetpilot 2620 and 2720 MSRP and street price (both MSRP >$1K but sell on the web for ~$750-$850), the actual street price should be ~$550-650 (the Nuvi has a similar MSRP as the C330 and Quest 2, which both sell for the street price listed above).
While still high, this is not the much more than a PPC, BT reciever and Navigation software (actually probably a little less). Nonetheless, total functionality of the Nuvi will be lower than a PPC combo.
Don