The option to add "make an offer" is not showing on my listings. How can I fix this?

[beckoningbroom]

There is no button to turn on "Make an Offer" on my listings. Where do I find this and how do I add it. Frustrated 😞

[sandypebbles]

I don't know if you can when your items have a price range/variation listing that you already have  % savings on

but

Adding Best Offer to your listing | eBay