All used tv are equally worth $50 at most. Otherwise you can find a brand new under warranty very affordably.
No all used TVs aren’t worth $50. Warranty isn’t a concern with a TV that far outside the warranty period anyway because warranty issues present themselves typically inside that first year. If your TV makes it past a couple years whatever breaks on it is unlikely to be covered by the warranty and was most likely some sort of power surge in the home.
Hell I could buy 2 used LG CX TVs and still be under the price a single C3 cost with a warranty. Could buy one have it break and pay to repair it and still be under that.
I bought a C9 when the CX came out and had to get a warranty repair inside 4 months. Had the C9 since 2020 so 4 years almost and 3.5 of those years have been problem free.
Bought a C7 that’s sitting in my closet now. Paid hundreds for an extended warranty and never got to use it.