Hi,
Well, the taxonomy names related to woocommerce are different for each installation. You can use this trick to check their names:
1. Go under the Advanced Options -> Exclude include results panel: https://i.imgur.com/hIsm1Z9.png
2. Scroll down for the Exclude by Taxonomies option, and if you click the “Choose taxonomy” select, all the taxonomies are listed: https://i.imgur.com/x1HT9tI.png
For example, if you want to use the product_tag from as seen on the screenshot, you enter {__tax_product_tag}
I think the sale price is stored within the _sale_price custom field, so this should give you that: {_sale_price}