http://orbisius.com/go/woo | Bulk Product Price Edit
I just created a premium WooCommerce extension allows you to bulk change product prices (up/down) for all products or for a selected category and its subcategories.
– The plugin allows you (temporarily*) change product prices (up/down) of all products or for products that belong to a specific category and its subcategories.
– The price change can be by a specific amount or a percentage.
– The plugin will NOT apply price change in the WordPress admin area so you can see the actual price unmodified.
– Less risk of than updating the price directly.
* While the plugin is active & enabled