Recieved a Cabelas flyer in the mail yesturday Listing law enforcement trade in Glock 9mm & .40 Caliber models 17 & 22 with three mags for $349.99. Is this a good deal? In terms of price it seems to be. but does anyone here have the knowledge/experience as to if these trade ins are worth it or if thery are (or mostly are) worn out paper weights?????