Gallo can't keep up with demand, they're selling a ton of the Ref 3's so it's not surprising to see some being sold in the second hand market. Plenty of Gallo Ref 3's being bought, some folks will decide to sell 'em and move on to something else. Audiophila nervosa.
I have owned Apogee (Duetta II), Martin Logan (Quest Z and Aerius), and Eminent Technolgy (LFT VIIIa) speakers so it's fair to say I have a preference for planars. I couldn't be more pleased with my Ref 3.1's Jeff