At 12pm EST, three different color offerings of the $29 products went on sale on LipKitByKylie.com, and the website was swarmed by young people desperate to get pouts similar to the 18-year-old reality star's famous surgically-enhanced lips.
Now, Kylie's Lip Kit is being sold on eBay for as much as $255 for one color (Dolce K), while other sellers are charging between $100 and $200 for Dolce K or Candy K, the most popular of the three shades.
Other sellers are offering True Brown, the least popular of the shades, for between $70 and $150, while the lowest price is currently $68.
When shoppers attempted to purchase the Lip Kit earlier today, the website slowed and users were met with an 'Error' page, or a page saying: 'Your cart is currently empty' despite them having added the products to their shopping carts.
The Keeping Up With the Kardashians star first made headlines last year for her shockingly full pout, but only admitted to getting lip injections on the reality series last March.
Speaking to the cameras, she revealed that she had been having 'temporary lip fillers' - having denied using any form of cosmetic enhancement on her pout for months.
Explaining on the show that it was 'just something I wanted to do', Kylie added at the time that she 'wasn't ready' to talk directly to the press about the procedure and instead decided not to 'confirm or deny' it when asked by reporters.
Now, however, she's happily making a career out of her surgically-enhanced pout, by offering her fans the chance to replicate her plumped-up lips without the help of fillers.