Something that hasn’t been said here that might help clarify it for some:
You are not a business. the tax law was not meant for you. It was designed for those who make their living by reselling on ebay. Have a garage sale and resellers will show up trying to buy anything they can resell for pennies. they will be moving fast and have a truck already half full of junk.
But in typical government fashion, they decided to go ahead and tax you if you made a profit, even it it was just luck.
As an aside, I’m not sure what happens if you sell 10 items in 2024. You sold 9 at a loss of a total of $10,000. But you sold one at a profit of $1000. You had a net loss of $9000. I hope they don’t tax you on the $1000 profit. Those of us used fo filling out schedule D for capital gains know that this isn't how it works, we even harvest losses in December to offset gains. But since they aren't letting you use losses to offset income, they may not let you use losses to offset gains made through other sales.
Jerry