class Product(models.Model):
    seller = models.ForeignKey(SellerAccount)
    media = models.ImageField(blank=True,
        null=True,
        upload_to=download_media_location,
        storage=FileSystemStorage(location=settings.PROTECTED_ROOT))
    title = models.CharField(max_length=30)
    slug = models.SlugField(blank=True, unique=True)
    description = models.TextField()
    price = models.DecimalField(max_digits=100, decimal_places=2, default=9.99, null=True,)
    sale_active = models.BooleanField(default=False)
    sale_price = models.DecimalField(max_digits=100,
         decimal_places=2, default=6.99, null=True, blank=True)