Hello,
1 license (key) means 1 theme. At this moment we have an amazing price of XStore = $39. Regular one is $59. All our premium customers (more than 10 licenses) have a fixed price of $39.
https://themeforest.net/item/xstore-responsive-woocommerce-theme/15780546?license=regular&open_purchase_for_item_id=15780546&purchasable=source&ref=8theme
Regards