media mail

do cards count as 'media'? i received an 84 topps fb set shipped in the std white box and it was stamped media mail ($3.15). i returned to the seller today for refund and it cost double that to return. the mail clerk asked what was in it and when i told her she said cards would not qualify as media so i had to pay the $6.50 to return the item. why is media cheaper to send and the lady said the guy could get in major trouble if he was caught. i'd hate to know i was going to jail or something for trying to skim on shipping.
Thanks,
David (LD_Ferg)
1985 Topps Football (starting in psa 8) - #9 - started 05/21/06
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Comments
Collecting 1970s Topps baseball wax, rack and cello packs, as well as PCGS graded Half Cents, Large Cents, Two Cent pieces and Three Cent Silver pieces.
1994 Pro Line Live
TheDallasCowboyBackfieldProject
Formerly (and colloquially, still) known as "Book Rate", Media Mail is used to send books, printed materials, sound recordings, videotapes, CD-ROMs, diskettes, and similar, but cannot contain advertising. Maximum weight is 70 pounds (31.75 kg).
* Delivery standards are 5–9 business days
* Rates based on weight
* Much cheaper than Parcel Post, but slower
2.3 Postal Inspection
Media Mail is not sealed against postal inspection. Regardless of physical closure, the mailing of articles at Media Mail rates constitutes consent by the mailer to postal inspection of the contents.
Here are the rules for MM posted on the USPS site:
Media Mail