btw... if you have a Nuvi 200,250,260, or 270 and you are looking for an inexpensive handlebar mount, this one from Garmin works really well. When not in use, the whole bracket slides off the retainer plate just leaving a very small black clip on the handle bar. Very low profile. Straps down tight with the wire ties, wont scratch the bars.
Garmin nuvi Handlebar Mount at REI.com
Garmin nuvi Handlebar Mount at REI.com