'Cheap' is a relative term. What you think is cheap isn't necessarily to another guy. Like mxsailor803, the type of bullet matters too.
Anyway, Midway is listing Hornady 55 grain FMJ's and SP's at $469.99 per 6,000 plus shipping. Their price for Armscor bullets is less than that, $90ish per 1,000, but those are currently on back order.
Rainier plated 158's are on sale at $99.99 per 1,000.
Buying components on-line gets expensive quickly due to shipping costs. Shipping costs are not set by the retailer. They're set by the carrier according to the size of the package, its weight and distance.