Unless I were to start reselling on eBay, I don't think you have much to worry about. I only need so many shoes, and my wife's patience is already worn thin. I'm really only looking for a few specific models at this point. I also dig for unicorns and issue PSAs from time to time, such as for this Townley. Eventually, I will automate this inventory search more than I have right now, but I currently have a process that works for finding for unusual styles, colors, or pricing.