There are some collectors of law enforcement firearms. They might attach a premium of some amount to it. If it's not marked as being a police gun doesn't mean it is a police gun...the letter is the only evidence. Florida State Police did issue nickel plated Colt revolvers, Pythons included.
If you want it but don't care about it being issued to the FL State Police then don't pay the premium. Just because a seller says it does doesn't necessarily mean it does.