I slap mine in newspaper and an old Safeway bag. For bigger items like teapots, people get two full sheets of newspaper, for mugs you get a half sheet of newspaper. I have hardly any plastic bags anymore as we try not to bring them home from the store. Lots of people bring a re-usable cloth bag to the sale.
Its about the pot, not about the package. I am selling from my studio, maybe I would get unprinted newsprint if I was in a four day sale.
Remember to reduce,re-use, and walk softly on the back of Mother Earth.
I have a small comment here.
It's OK to be "earth friendly" and use newspapers etc. ... but I cringe at the "slap mine and stuff it in an old Safeway bag".
You can do earth friendly with a bit of style that makes you memorable.
First, you don't slap them into newspaper, but fold the paper properly, make it neat and tie with twine or cord.
Add a card with all of your contact info printed on re-cycled paper.
Close that Safeway bag in an attractive manner ... with a twine bow if it has handles or a bit of tape or sticker if it doesn't.
Just because you are using re-cycled materials does not mean it has to look used or recycled.