I've never been to one of these meets. Pretty cool that discounts are offered by vendors and manufacturers.
My friend heard my setup and he like the sound signature and brought 1 set at Camjam Singapore 2017. Both of us got a good discount given by sony during the Camjam Singapore. On top of Bundle discounts for both TA ZH1ES and Z1 headphone, I also got balance Kimber cable thrown in - free of charge.