I didn't know Feijoas were sold in supermarkets. From my experience, they have a one-day window of peak ripeness, so they don't seem to be good candidates for supermarkets. These puny, shriveled feijoas cost $1.79 each at a supermarket here in Los Angeles. That means I've been eating at least $17.90 worth of feijoas every day. Luckily for me, they're free because I have a tree full of them.