You can find PC tools pretty cheap on CL and OfferUp. I wouldn't go out of my way or spend a lot of money on them. You'd be better off with DeWalt, Makita, Milwaukee, Ryobi as the selection of tools is a lot greater. PC might be shoved aside for the Craftsman line?
But if your PC stuff is working well, no need to dump it. Use until it breaks. Nothing wrong with being in 2 platforms. I am in Makita for my main tools (drills, saws) and Ryobi for the less critical stuff (jobsite radio, lanterns, flashlights, tire inflator). Also got a couple of Ryobi drills, so if I am working with a friend/relative we can both run screws at the same time.
Once you have a couple of batteries and a charger in a platform it's cheap to add bare tools. Or buy a kit with the tool(s), batteries, charger and then add bare tools.