I just received a perfectly working, used LTN121XL01-N03 from AliExpress seller
“NEW VISION ELECTRONICS TECHNOLOGY CO., LTD”. It seems that they have more in stock.
As I had asked them explicitly to test it before sendind, they sent me a video of their test! A better service than Displaysscreen…
The bezel has scratches, but the screen itself is in perfect condition and there are no dead pixels. The only thing I cannot judge is its remaining life expectancy, as I have no idea how long it was used before.