The WooCommerce MSRP plugin GPL allows you to record Manufacturer Suggested Retail Prices / Recommended Retail Prices against your products, and have them displayed on the sales pages. This allows your customers to see why it’s a good idea to buy from you.
On your product edit screens, you’ll now see an extra field with the normal pricing information, labeled MSRP. You can enter the MSRP here and it will be shown on the front end to your customers.
If you’re bulk importing products, then the MSRP can be imported by using meta: _msrp. By default, the MSRP will be shown struck-out – much like a sale price. You can style these however you want, the whole content is within a div with a class of woocommerce_msrp, and the price itself is within a span with a class of woocommerce_msrp_price.