Don't Buy the Seller () is a 2023 South Korean crime thriller film co-written and directed by Park Hee-gon, starring Shin Hye-sun and Kim Sung-kyun. In the film, suspense unfolds in the daily life of Soo-hyun, who becomes a target of crime through second-hand trading. It was released theatrically on August 30, 2023.
Ordinary office worker Su-hyun buys a washing machine through a second-hand transaction after moving to a new place, only to realize that the machine is broken and she's been scammed. Determined not to let it slide, Su-hyun tracks down the elusive seller and starts leaving comments on all their posts, exposing them as a fraud and disrupting their deals.
From that day on, eerie incidents begin to plague Su-hyun: mysterious phone calls, food deliveries she never ordered, and strange men showing up at her doorstep in the middle of the night. Her personal information has been completely leaked, and unsettling traces of intruders appear throughout her home, gradually dismantling her daily life. As an official investigation gets underway, Su-hyun, accompanied by Detective Joo, visits the seller's home, only to discover a dead body there.
Principal photography began in July 2021 and ended in October 2021.
, Don't Buy the Seller has grossed $3 million with a running total of 424,916 tickets sold.