How to access 'Sell' Price compared to 'RRP'

I need to setup a script so that if a product has the ‘on sale’ checkbox that it shows the Sell Price instead of ‘RRP’. We are currently using {{this[‘priceWithTaxHtml’]}} so how do we access the Price with Tax HTML for the Sell Price? I can’t find the ‘Sell’ field in the module data - https://docs.treepl.co/component-types/module-products

My understanding is that the this['priceWithTaxHtml'] is the sell price.
Instead, you’d conditionally show the RRP with this['RecommendedPriceHtml'], although I’m not sure if this includes tax?