During my career I constantly let go of cameras, computers and such. Sometimes I wish I had kept my Hasselblads or at least my 4×5 camera that was a finely crafted field camera made of cherry wood. Not that I would want to still use them, but to keep them as sculpture or as a reminder of the days when photography was a craft that actually required skill and patience. In the right hands (which occasionally were mine) they could produce amazing images. The cameras were durable and well-built and meant to last a lifetime, quite literally. Today those cameras are just relics from another era and unfortunately not worth very much. But they were my tools then and they served me well. It was easy to let them go and move on to the next, newer technology. No sense being the last stage coach builder.
