Ask HN: Apple submission doubt

Hello,

we're finally about to submit our app to the Apple Store. But, we have a doubt. We're starting as a social network, then the next step will be to become a marketplace where user will be able to buy and sell within the app.

The problem is, till we build the marketplace, we'd like to collect the price of the objects the users will want to sell, this to avoid users to edit every object in a second moment.

For now we have a On Sale button with a pop up message "Nice! your item will be on sale as soon as the marketplace will be online" and a price container. As far as I know Apple will reject app with not active feature, so I was wondering if you could give us some ideas on how we can move on this.

Best, Filippo