A extension for WooCommerce, which adds wholesale / trade functionality to your store. An extra field will be added to your product data tab, where you can add a “wholesale” price. This is applied to simple products, as well as variations.Once a price has been entered, it will override the default product price with the new wholesale price you entered. Wholesale prices will only bee shown if the current user has a specific role of “wholesale_customer”
Demo: http://codecanyon.net/item/woocommerce-wholesale-prices/5325378