I drill & tapped a old mirror perch for my GPS but the ways are almost endless. = think about a "ram lock" for things you want to leave on bike. I lock my ebay, $69.99 rebuilt TomTom & leave it on the bike 24-7. I figure if it gets ruined from rain or stolen I'm out $69.99, not $600 - $800 bucks for a hi end one. It gets to & from, just as good as the hi end ones.
I used a u-bolt flat mount and replaced the u-bolt with a flat piece of metal with two holes in it and pinched the bar for my GPS. Lower down the bars and a swivel piece to get the unit exactly where I wanted it. A clutch perch for the cell phone on the left and another on the right for drink holder. A 60 dollar gps is no where near "just as good" as a top of the line Zumo not even in the same league so really not comparable.