Like a few others on the forum, he can't help it.
I don't know what you're selling on ebay but I do doubt that its ALL ebay sales. People on ether side are concerned about the near term economy. A lot of times when this happens, we see people avoiding big luxury purchases... like cars for example, but we often see an uptick in small luxury purchases. Think hand bags for the women and libs . Overpriced coffees, lots of things. The idea behind it is that people view those smaller luxury items as a needed treat for themselves during stressful / uncertain times. Individually, they won't break the bank and bring that temporary serotonin boost. Practically speaking the spending is often much worse since the boost in happiness and usefulness of those purchases is much more fleeting and can quickly add up to and surpass the cost of that larger luxury item.
I would bet people are still buying pre owned Jordans, the crazy Labubu things my nieces are obsessed with, designer bags, etc.. If you were reselling that kind of stuff you're probably loving it right now.