when I sell to repeat customers.
This set of notecards was sold to local customers in my hometown who have regularly purchased from me in the past two or so years. There's a lot to be said about getting to know your customers, because I met this couple face to face only once at a local market stall many years ago where they first saw my artwork. I didn't even have an online shop back then, just an email address and a handful of business cards. They must have been impressed because they've followed my progress to this day.
These and all other customers are like gold to me, not because they buy my stuff, but because they help push my work a little further around the globe - and for this I'm truly indebted to them.