A Sydneysider who is selling their ballot paper on the same-sex marriage postal survey has been warned they face possible jail time or a $2000 fine, with an independent senator saying it's making a mockery of the exercise.
The eBay listing, which has been taken down, was published on September 18 and titled, Buy My Vote.
The bid started at $1500.
"What is this plebiscite worth to you", the seller writes in the ad description.
"The reason I'm selling my vote is because either way I don't care, but thought there are people who do."
The seller promises part of the proceeds of the auction will go to help kids battling cancer.