Aaron Hernandez Jail I.D. -- Craigslist Kills Auction ... Seller Goes To Facebook

Aaron Hernandez's jail I.D. has been rejected again -- with Cragslist banning the sale of the item ... so now the seller is trying his luck on Mark Zuckerberg's turf.

As we previously reported ... the guy who currently has the I.D. says he happened to come across the item during his stint at Suffolk County Jail, where Hernandez arrived in July 2014.

He tried selling it on eBay, but the site killed the auction. Then he moved it to Craigslist, which also shut him down. So, now he's moved to Facebook ... where he's upped the asking price to $6,000.

His sales pitch -- "Act fast who knows how long this may be posted up."