Choose the resale options among those proposed by the partners, which you intend to show on your site.

Access the management system by clicking twice on the component and then on Booking Management in the blue edit bar.
Choose the structure and from the menu select Partnership.
Click on Dashboard and activate the option Available for affiliates, if you have not yet enabled it.

Go to Resale and click on the property name to view the available sales options.
Check the ones you are interested in including on your site, and in case there are empty resale fields, set a price that will be visible on your site.

The resale price will be shown to end users when they make a reservation on your site.

To show active partner services, you need to use the Booking Reseller component.
Read the guide.

N.B: the cost of resale can never be lower than the cost of the sale.