The cost for mailing slabbed comics seems off. I have one slabbed comic that sold and the postage amount that Atomic Avenue put in was $8.15, which isn't even cover 1st class postage by the time it's was packed. With all the protection wrapping around it, it was 2 lbs. And it's longer then a Medium Priority USPS box. Any suggestions on mailing it safer without paying a bunch for postage...besides Media mail.