What "No recent sales" means
No sold listing was found for this printing lately. The range still stands on live listings.
Under the price range, Zukan shows real recent transactions when the venues it reads have any for this printing. When they have none, the sheet says No recent sales rather than showing an invented figure.
It does not mean the card is worthless or unpriced: the range above it is built from current listings. It means no sale was observed lately, which is common for old, foreign or very cheap cards.