google stainless steel maple creek edition Callaway golf watch value.
It will determined by how much someone is willing to spend, not your asking price.
Contact Callaway support. http://www.callawaydmd.com/product-support
1-888-606-4634
There is some question whether the watch itself is yet available much less the charger. TGW says it is no longer available but Walmart declares it is selling it. Callaway licenses their name to it but is not the manufacturer. I don't know if chargers for the rangefinders are compatible with the watch. You might ask Callaway support. If so, Newegg sells (Amazon has a variation) such: https://www.newegg.com/callaway-upro-mx-upro-mx-golf-electronics-accessories/p/2TK-000F-00001