Thank you for your reply. These are indeed MLB tix bought through Ticketmaster. When viewing in the Ticketmaster app, each ticket shows a QR type image with a blue vertical bar that moves back and forth constantly across the QR. The SELL option has been disabled, only TRANSFER is available. But the link to ticket details did indeed show a 19 digit barcode number. I guess what threw me is that I was looking for an actual barcode. I uploaded those to SH and now my listing shows 'instant download'. Not sure what happens next.
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