Thanks for the replies.

I'm hoping to not spend more than $200 but I also don't want to get something that won't last or work well.

I'd say navigation is greater than touchscreen and from reading reviews say drop the touchscreen altogether.

Where are suggested places to find the 500 or 800 model used? Would certified refurbished give some warranty or not matter?

Using a tcx file for the route instructions looks sufficient and I could use my cell phone Google maps if I'm totally lost. I think most of the time I'll be biking o known trails/places but having a back up if there is low or no phone signal would be a nice plus.

I'm also not in a rush so could wait till the Garmin 520 release. Either that model or if that makes prices go down.
I also heard about lezyne, they are coming out with a gps unit, I'll edit this post when I find a link. Retail $200

How is Magellan vs Garmin? That's a good price on the Magellan.