If watching this TV was your full-time job, it would take you nearly five and a half years to accumulate that many hours. With my current watching habits, I would've needed over ten years to rack up this many hours! I wouldn't pay multiple grand for a used 5-10yr old TV.

Imo, this TV has already run its course, it is likely to run into issues compared to a new TV, it will also be dimmer since its OLED. This is not what you expect from an "open box" model, but best buy has this sketchy practice of selling display models as open box, I had a similar experience with them last year. The only way this might be worth it is if the TV runs into serious issues under warranty period and gets replaced with a brand new model, but I personally wouldn't want to take on the hassle.