Glocks are LEO only in MA unless pre 1998.
High caps can go to dealers or LEO, the gun can be sold to a dealer or LEO in MA...but not an individual. You would find a better market for it out of state.
Just a clarification: The rules regarding the transfer of firearms between individuals is a bit different than between a dealer and an individual.
Individuals can sell anything to anyone, list are of no real concern. The real issue for LE guns being sold to individuals is the "purchased for duty use, not to be resold" clause that many of you purchase your guns under.
Example: A LEO wants to buy a gun not approved in MA (like a Glock). I can order it and sell it to him or her BUT the gun can only be sold for official use (duty or off duty). It also is clearly stated that gun will not be purchased for resale (in MA).
In many cases the guns were cheaper because you didn't have to pay "FET" a federal tax for sporting firearms. So there is a very fuzzy area in the law if a LEO resells a gun he or she ostensibly bought for "duty" use.
Most fo the time we take them in as trade guns and then sell them outside of MA to cover all the bases as a dealer.
Another few questions.
Is the Glock 23 .40 on the list?
I am moving out of state and don't want to take it with me..although I love it..

I have two 10 round mags that are unused.
I have 3 "new" LEO-Only 13 round mags for it and I know I can't sell them to Joe Schmo, but can I sell the Hi-cap mags to a fellow LEO?