Interestingly, both Ebay and TurboTax now have current pages addressing this topic:
You only need to report personal items that you sold if they were sold for more than what you originally paid. Let's say you purchased a vintage nut grinder for
ttlc.intuit.com
Starting on Jan 1, 2022, IRS regulations require all businesses that process payments, including online marketplaces like eBay, to issue a Form 1099-K for all sellers who receive $600 or more in sales
pages.ebay.com
I'm not an accountant (etc.), but "selling personal items at a loss" sounds like most knife sales here. In that case, this would seem to be a minor filing chore with limited, if any, financial impact.
Folks capitalizing on hype to sell at a profit, and flippers, would have income to report (which was already the case).