The shipping terms specifically states Priority Mail with a guaranteed delivery date. If item does not get delivered by that guaranteed date, I can either receive a 5 dollar voucher from
ebay or send item back at sellers expense. Seller is taking a risk being cheap at missing the guaranteed delivery date by using Media Mail, which item does not qualify for. If package gets inspected, then I will have to pay difference in postage, which is not covered by reimbursement or refuse package and file a case. In any case what seller did is against USPS regulations and not best practices.
I will wait optimistically for package. Yes, the 800 pound gorilla has been negative overall this year for me as a buyer after 17 years of smooth sailing.