Thx, I think I will ask my neighbor. I just remembered he told me a awhile back that he got a 17 trade in for $250 and those online look like they are top dollar.Here is one source I found with a quick internet search.
https://www.sportsmansoutdoorsuperstore.com/category.cfm/sportsman/police-trade-in-glocks/of3/9-MMThere are others out there as well.