Mike, I don't even have to look at the your info

, being plated, whether gold, silver or nickle will only appeal to some folks. Value on a plated gun is about $450 - $650, maybe more if someone is taken by the "gold" color.
Value, unplated from $650-$1100, maybe more if it had been in really, really nice shape (I sold one recently for $1500 that is really nice, have another one like it), usually police in really nice shape sell for around $1000-$1300.
It is a police gun, was originally army, then taken into police service (the S.P.L. is known to me, I have a SPD marked luger)
Ed