I've got this. Its used and working perfectly. Some light scratching on the screen due to swiping between training screens, nothing out of the ordinary. Charging cable, Garmin soft strap HRM, and a little rubber protecter specifically made for this device. Original box and manuals included, and the AC adapter. I will also include a SRAM off the front mount that I don't use. I won't be able to ship this until Tuesday (12/1) at the earliest, but I will use USPS Priority Mail. $200 shipped to continental US.

My email is jonner66@gmail.com if you'd like a picture, though it is basically the exact same looking 510 you'd see in every other pic out there.