Guns N' Roses Concert Wristbands Going for $$$

Guns N' Roses fans are turning their $10 wristbands into huge moneymakers ... possibly getting up to $4,000 for just one of the golden tickets to Friday night's show.

One lucky fan who waited in line Friday morning to snag a wristband for the Troubadour gig immediately went to Craigslist and listed it for $2,000. The seller says he's gotten a ton of offers -- one for $4k, which would be about a 40,000% markup!

The twist? GNR's said the wristbands are non-transferable, so without a way to prove you're the original owner ... you might still be SOL depending on what security asks at the door.

Wanna gamble?