I sell a bit on eBay too and honestly the camera mattered less than the setup. For short listing videos I lock my phone on a cheap tripod, turn off auto exposure, and shoot next to a big window with a white foam board bouncing light back. If colours look flat, set white balance manually and add a touch of saturation in a free editor rather than chasing an old camera. Blues come out much better once the white balance is fixed. Keep each clip slow, one smooth turn of the item, then a close-up of labels and any flaws. Buyers trust that.
