pbp_com/apps/classifieds/managers.py

from django.db import models
from datetime import datetime

class LiveManager(models.Manager):
    def get_query_set(self):
        return super(LiveManager, self).get_query_set().filter(expires_on__gte=datetime.now())

class FeaturedManager(models.Manager):
    def get_query_set(self):
        return super(FeaturedManager, self).get_query_set().filter(featured=True).filter(expires_on__gte=datetime.now())