The line comes from Capcom's Resident Evil 4, released in 2005, where the mysterious travelling merchant sells Leon weapons and supplies between chapters. Every completed purchase triggers his gravelly chuckle and a quick thank you, one of several memorable shopkeeper lines alongside his famous greetings. Clips of the merchant's dialogue spread through YouTube compilations, gaming forums and soundboards in the late 2000s, and the thank-you line became a shorthand for completed deals. Streamers and editors still drop it over trade and shop memes today.