You can set „Unlimited” for durations in Durations settings.
This is helpful if you want to allow never expiring adverts (for example for a higher money amount - see how you can earn with DJ-Classifieds).
1. First go to DJ-Classifieds main panel and open „Durations"
2. Click "New"
3. Now set „0” in Days and set your prices for regular purchase and renew price and click Save.
Now when submitting new advert user can choose „Unlimited” option
and this advert will never expire what is reflected in Ad details