Back right after the Sandy Hook tragedy, when action was looming, I had buddies coming up to me "hey man you got them AR's?" They were all military buddies, and I had several builds ready as I was building the AR's as hobby and selling to just return a small profit to build better rifles.
i said yea, but the market is crazy, why would I sell to you when I can throw it on gunbroker for 1k easy. I told these dudes I had 4-500 into these carbines, and jokingly said I'd take 2k. And they snapped em up. I offered full disclosure to what they cost but it didn't matter. I sold all my AR's and don't even ask what I sold 5.56 for. Reeeee-dick-you-lusss.
I'm not in the know for the MA market, but look at classifieds here, see what's sold and hasn't sold, and base your price accordingly based on how much you want vs how long you want to sit on it to get that amount. If for some ungodly reason was forced to move to MA, I would drain my savings to buy all the Glocks I could afford and bring them with me, sell at a reasonable price, make money, and get more of them into the state. Win win win.