Garmin Montana 610T GPS with onX cards

I have a next to new handheld gps that I bought and used for one hunt and has been sitting since. I thought I would use it more as I bought Montana, and Wyoming onX cards for it and only ever used the Montana one the Wyoming card has yet to be opened everything works as it should and comes with everything it does from original packing the gps is $550 new and the onX cards are $120 a piece all for one price of $450