If you're on a tighter budget than an average bride and groom, consider having a cocktail reception instead of a full sit-down meal. Concentrate on the displays and presentation of the food, make your cocktail reception stylish with beautifully displayed hor d'oeuvres. Perhaps have the servers wear tuxedos to up your cocktail reception a notch. This would seem more high-end than a buffet dinner with massive amount of food.
Keep in mind that you will only save if you plan well. Otherwise, your stylish cocktail reception will end up being more expensive than a sit-down meal.
From Style Me Pretty.
From Vegan Yum Yum.
From Sandwiches Salads and Such Inc.
From I Live to Cook.