I slow down at the end of the year. I hate the holiday rush. I was going to work the resell business through Christmas this year because funds were a little tight. I was ecstatic when the crypto market started to rally.
With eBay, I generally just fill orders that are purchased and not do any new listings for the month. Anytime I've gotten a negative on eBay has been around the holidays. People expecting miracles and ordering a few days before Christmas expecting it to be on time. Stuff that was out of my hands. So, I might lose some money, but I gain peace of mind and less aggravation through an already stressful season.
I also organize. Straighten out the desk and office. Right after the first of the year I do crypto taxes, then back to business as usual with trading and daily reselling.
That's a smart personal and business strategy. Save yourself the grief and enjoy the holiday more.