The person selling Aaron Hernandez's official jail I.D. card from Suffolk County jail in Mass. says eBay has shut down the auction ... so he's moved it over to Craigslist.
We broke the story ... the seller says he "happened to come across the I.D." while he was locked up in jail with Hernandez ... and managed to smuggle the item out of the clink. Starting bid was $500.
But now, the seller says his plan hit a speed bump ... when he got an email from the auction site saying they suspended his account.
We reached out to eBay for comment -- but haven't heard back.
The seller tells TMZ Sports he's still optimistic about making a deal ... and has upped the asking price to $5,000.
So far, no word from Hernandez either -- since he's still on trial for murder.