The 16-year-old took one spot-saver for himself, and another to auction off to hardcore Apple fans desperate to get their hands on the new product straight away.
After managing to wedge himself in place 24 and 25 from the front of the line, the young entrepreneur directed inquiries for his investment seat to Instagram.
'Selling #25 spot in line for the iPhone X,' he wrote on a whiteboard perched on the chair.
McDonald's employee Lee Cselko, 16, has made serious bank after saving a spot at the front of the line for Friday's Apple iPhone X release
'DM (direct message) me on Insta(gram) @lee_cselko to discuss details,' he continued.
In an ambitious move to make a quick buck, the business-minded youngster offered bidders a 'guaranteed' chance of getting the iPhone X upon its release.
'You will get the phone 100%,' he assured in the top corner of the board.
The sought after position didn't last long among punters, with Mr Cselko's DMs flooding with bids from eager iPhone fans.
'I just put a seat next to my other seat and started advertising that I was selling it, and to be honest, it has blown up haha,' he revealed to Daily Mail Australia.
By Thursday evening, the teenager accepted a whopping offer of $500 for his prized position.
The 16-year-old (pictured) took one spot-saver for himself, and another to auction off to hardcore Apple fans desperate to get their hands on the new product straight away
He said he borrowed the idea from people using an online task sharing site who were offering money to have someone else save a place in line.
'I looked on Airtasker and saw people offering money if they line up for them.'
Friday's hotly anticipated release of the phone has seen frenzied fans transform part of Sydney's busy George Street sidewalk into a campsite-like scene.
YouTuber Dave Lee, who proudly occupies position one, has spearheaded a campaign to create the world's largest line.
At the start of the line is a child-sized blackboard with butcher's paper attached to it, calling out for more people to join the trail of $5 camping-approved seats.
Friday's hotly anticipated release of the phone has seen frenzied fans transform part of Sydney's busy George Street sidewalk (pictured) into a campsite-like scene
'We are building the world's longest line,' it reads.
'To secure your free spot join our Facebook group 'We are making iPhone great again'.'
But the city's council are not as enthusiastic about the unsightly deckchair trend and are looking to have rangers remove them.
Mr Lee has posted six videos to YouTube about his experiences at the front of the Apple iPhone line, which have garnered hundreds of views.
He promises to 'try and take care of everyone's position' from the hours of 8pm to 7am when they can't be camped on the footpath.
But those who fail to check in on their position in line each day will have their chair replaced by the person behind them.