BigCommerce supports various pricing tiers for each of your store products, one of which being MSRP, please refer to this guide.
Currently, Klevu does not support MSRP in search results out of the box. However, if you would like to show the MSRP value in the search results then reach out to the support team.
We index the Default Price of the product, the Sale Price of the product, and the MSRP of the product. If the Sale Price is lower than the Default Price, this will result in a was/now style price display in Klevu search results.