CyberWeek special - if you have an older Nuvi that doesn't include map updates, for $20 you can get the current version of City Navigator (regular price is $50). Note that this update can only be installed on a device that was pre-loaded with City Navigator. It should also work if you purchased City Navigator on DVD but will not work if you purchased it by download or on a memory card. Garmin makes this stuff very confusing… 
https://buy.garmin.com/en-US/US/prod143302.html
https://buy.garmin.com/en-US/US/prod143302.html