I picked one up this past spring. It's a Garmin Street Pilot 2720, which had been discontinued but replaced
with a 2820. I got mine through Amazon for $115.00, which included everything plus 1 year factory warranty.
It's a little big, and I wired it directly (no battery in unit).


The units are waterproof and functional for riding. I mounted mine center of the bars, blocks the tach and speedo
some but normal mode on the GPS gives speed anyhow.