I was asleep at the wheel on this one. We list thousands of singles online. Card prices move every day. Ours didn't. I priced cards when they hit the shelf and never touched them again. Market drops, we look expensive, the card sits. Market spikes, we're the cheapest listing on TCGplayer and somebody gets a gift. Both directions cost me money. I couldn't see it because sales kept growing anyway. That's the trap. Growth hides sloppy. $5M+ in sales and I was still pricing like a guy at a garage sale. W. Edwards Deming said a bad system will beat a good person every time. I had no system. I had me. So we built repricing logic into the workflow. Every listing gets checked against market on a schedule, not when I happen to remember. Stale prices went from normal to rare. Margin came back without selling a single extra card. After 20+ years running businesses, the lesson I keep relearning: if a process depends on you remembering to do it, it's already broken. What's the thing in your business that only works when you're watching it?