Is there any way to suspend an app in the Apple Store.
My app is already published but I want to suspend it until I launch a new version?
The only options I found were changing the Avaiability Date or setting the Price Tier to something huge.
Is changing the avaiability date the best way to do this?
You're looking for page 107 of the PDF version of the iTunes Connect Developer Guide. The HTML version of iTunes Connect Developer Guide has a direct link to Removing an App from Sale
"After removing all assigned territory checkboxes from your app in the Rights and Pricing section, the status changes to Developer Removed from Sale and your app will not be seen on the App Store within 24 hours."
App restoration instructions are on the next page. :)