Reuters/Shannon Stapleton
The glitch - which has since been fixed - was first reported in a thread on Reddit and reportedly lasted several hours.
Best Buy hasn't said whether it would honor the gift cards. We reached out to the company for comment.
"I am an employee of Best Buy, and we are very good at honoring our mistakes, however, mistakes this public with 1000s of people ordering something super discounted by mistake will most likely get canceled," one person wrote on Reddit. "In the mean time, I went ahead and ordered 2, but chances are, we're all getting a refund."
A similar glitch on Wal-Mart's website two years ago caused a massive frenzy when customers were able to purchase TVs and computer monitors costing up to $600 for as little as $8.
Wal-Mart did not honor the purchases that were made during the glitch.