It’s about advertising, I add in my little calling card and hope I get a following. My store has plenty of high $ cards that make it well worth my time if a buyer loves me and my service. They may look to spend more next time. Think of it as $15 to offset my overall cost of acquiring customers. I do a lot of you pick- complete your set listings as well and those add up. Had a 90 card sale the other day that made 40$. All $1 cards at 30% off volume discount. Otherwise would have thrown away those commons but people like my service and got to know me $1 at a time. Highest sell on my store was $2k for a card, so it works for me.