Xbox - Setting a b/o price for an item

Hello all

I am enjoying my first league experience, I have played the game before but never in league, I am enjoying it.

I have a question regarding trading.

I have a premium tab and I know how to set the amount, and had some sales.

However, when setting the price there appears to be a drop down box, and the current selection is 'Negotiable Price', I would like to change this to offer or B/O, but cannot seem to find the button to select this drop down menu. (XBOX)

Can anyone advise please.

Thanks

From what I have read online it doesn't change so I just keep it as that. I mean people will still pay you whatever you have listed apart from some who try to haggle lol