In the UK we have Richer Sounds who offer free 6 year warranties on TVs, and 5 year guarantees for 10% of the selling price for everything else, and give you your guarantee money back if you claim it at the end of the period. So my Sony OLED came with a 6 year warranty as I got it from Richer Sounds. I would have taken one out as it was circa £2000 if it hadn't, as with a TV the screen is everything.
In general I don't think they're worth it, but I do for expensive or equipment with a lot of moving parts, I did for my Denon UDP which became irreparable after 4yrs & 9mnths and I got the £350 cost back which I put towards my Oppo 203, but the guarantee was only £35 for 5 years for the Denon - again from Richer Sounds.
Do you have any Hi-fi/TV chains like that in the USA?