You might want to re-think that "Media Mail" postage on your magazines, the Post Office is really cracking down on people trying to ship things that don't meet the MM requirements. If your magazines have ANY advertising they don't qualify. If they check your shipment, you or your buyer could get a big postage due bill. Just something to think about, personally I wish they did allow mags in MM, I have tons of photo mags I need to sell.
I agree have you seen a copy of Aperature it has no ads more of a monograph of photographers work unlike other photo magazines that have commercial store ads like BH Adorama etc...,,there you may have a problem. I been selling by mail for over 35 years..... Price reduced to $50 plus shipping BTW I found that ship priority in a flat rate box or Regional box was sometimes not much more than media rates or even cheaper at times