Exercise equipment is different because everything literally sold out everywhere.
With TV's there is just too much competition.
Same with consoles is the fact it's a new next gen launch. They have always sold out and sold for more to desperate people who can't wait a while.
My point is if I started buying up all the Samsung Q80T. Then had them on eBay for double the price. People would just start buying the Samsung Q90T or Sony XH90 or Sony XH95 or LG OLED's.
If I buy up all the lg oled then people will buy oled from Sony or Panasonic, etc.
You cannot just double the price of a TV and shove it on eBay. Well you can but I can't see how it would sell unless you literally bought every TV out there. Which would be impossible.
So it would be interesting to know the exact model. Because it doesn't seem feasible at all to do it.
FYI I made like £15k selling gym equipment on eBay in April last year that I'd paid £3k for years before. That was easy because all the gyms had closed and people had zero other option.
I was selling a pair of dumbbells for over £300 each lol. I think I paid around £750 for the full set so selling 2 broke even the rest was pure profit and I had like 17-20 pairs to sell.