The Gun Parlor is notoriously overpriced even where there aren't riots and election shenanigans.
Justin is a joke, and he and his friend Maura (to whom he sends copies of every 4473 done at TGP... even those done for things which do not require an FA10) can take an unexpected swim in the Boston harbor for all I (or many on this site) care. I strongly advise you look to any of the other MA dealers, and avoid doing business there. When not feeding private, sensitive information - without a warrant - to the Fuhrer, these jamokes spend their time inviting the media in to film hitpieces against their competitors (and their own customers), offering customers a pittance for their soon-to-be-marked-200%-above-market used guns, and falsely advertising prices and services online and over the phone.
The day TGP becomes the standard against which MA shops are measured will be a sad day indeed.
Shame they've still got a presence on NES.