I noticed not all Walmart stores carry OLED’s so the deal is extreme ymmv. Looks like these are just starting to clearance out yesterday. Yes there was a post about a year ago with these popping up at very few stores for $599.
I purchased mine earlier at the Austin, TX store (78753). Brickseek showed 4 for the 55" model, but only two on the shelf. There may be more in the back, but for sure one left (still shows 3). Employees told me they can’t afford it. Also if you go, speak to the younger gentleman, he was the only one that was willing to help as the others thought I was scamming them because of the price difference even after their manager told them she marked it down today.
OLED55C8PUA $799
https://brickseek.com/walmart-inv…=69416542
OLED65C8PUA $999
https://brickseek.com/walmart-inv…=43324596