For me, the answer would be 10. For most people, I'm sure it was less. Last January I joined Etsy and in February, set up a shop. Soon thereafter, I shot pictures and little by little (over several months), I worked on making a banner and setting shop policies (shipping, payment, etc.)... today, I finally got around to listing some items.
Over and over, I debated opening the shop, but finally decided it seemed like a good thing for those times I get requests or interest from people who aren't near a gallery, or for after a show. And if new people find my shop and buy, of course that's a good thing... I don't know how much time I'll have to promote it, but I do hope to be good about adding more items. I don't have unrealistic expectations for work to fly out of the shop, but hey, you can't win if you don't play... sound familiar?
It's a fact that I love making earrings. So no matter what, I see the shop as another possible way to spread some joy... if just one person buys earrings that make them happy, it will all be worth it.
For now, I'm just putting earrings in the shop. I may add some larger items like pendants or pins down the road. We'll see what happens. Anyone have an Etsy experience to share - as either a buyer or seller?