The range $ 0 until $ X in price range filter is considering unavailable products.

1. Enter the module "E-commerce"
2. "Products Management" tab > "Category"
3. Select a category
4. Click "Actions"> "Price Range"
5. Write the ranges you want starting with "$ 0 to $ X"
6. On the front of the store when filtering through the range "$ 0 to $ X" will appear the products unavailable even if they have higher prices.

When entering the lowest price range do not start with $ 0 (zero) put $ 0.01 or $ 1. By doing that the unavailable products will not be considered in this price range.