Up for sale are a pair of MB Quart Reference and a pair of MB Quart Premium crossovers. Used for a few months and have been sitting in my drawer for the last 1.5 years. Asking 110 shipped for all 4 of the crossovers. I will even trade for a Mosin Nagant rifle (I am a Mosin junkie) Most of my time is spent on firearm forums but I have a good reputation across the net so buy/trade with confidence. Email me at trackerpacker@gmail.com if interested.