Even though (most) recipes call for large eggs, that size is not usually necessary. You can get away with using a medium or a small egg in place of a large one most of the time. EX: If a recipe calls for 3 large eggs, try using 3 small.
This can save you money on your weekly grocery bill. Purchase whatever size is on sale each week.
NOTE: There may be a few baking recipes that really do need large eggs. Experiment with your recipes to see what may need them.