Tag Shopify product based on price range
You can use Auto Tags to tag products in Shopify based on the price range of variants. You can specify multiple price ranges along with the tag that should be used and the app will take care of adding tags where at least one variant falls in the price range and remove other price range tags that are not applicable.
You can configure it under Sync Product Tags Based On Attributes when creating workflow of Product type.
Tag: the tag to be added if at least one variant falls in the range
Minimum price: At least one variant must have a price greater than or equal to the minimum price. If you leave this empty, then the app will assume there's no minimum price limit.
Maximum price: At least one variant must have a price less than or equal to the maximum price. If you leave this empty, then the app will assume there's no maximum price limit.