Buy it now revision

[limelight-solutions]

Hello. I just listed my first item for sale on EBay and still learning the ropes. The item I listed was set up as a "Buy it Now" for a fixed price. Or so I thought. But the listing also says "Or Best Offer." I only discovered this issue when I received an offer half of my asking price...which I will not accept. Can I revise this listing to remove the Best Offer subtitle? I would prefer this listing to just say Buy it Now. Or do I have to delete the ad entirely and start over? I am using the EBay app for iPad, if that matters. Thank you.