Canal Zone UX3 postal card, the 1910 setting of the overprint on the 1 cent green and black with overprint reading up.  40,000 cards issues; 2018 Scott $190.

Your satisfaction is guaranteed. APS member since 1992 and ebay seller since 1996.  I am an accredited APS dealer member (Matthew Liebson, PaperHistory LLC).  See additional auctions under IDs paperhistory and budgetcoverbox.  Please consider joining the American Philatelic Society!

EBay handles collection and remittance of taxes from an increasing number of states.  I combine shipping on won items but please aggregate things and pay in a single payment to save multiple paypal payments.

$1 basic shipping.  $20 and under, I use the ebay standard envelope.  Over $30, I use a cardboard mailer where appropriate.  Over $50, tracking is required; $5 for domestic.  $2 letter shipping for international/$15 for ebay international tracking.