Buying in bulk can be a good thing!

I frequent a top notch car wash in northern California which offers customers several pre-paid options. During a recent visit, I renewed a card with 25 washes for $425. Note that this car wash also waxes, vacuums, and does windows on both sides. While purchasing the pre-paid card, the attendent, a young teenager, was clearly struck wondering why anyone would make this purchase. My take away was that he was focused on the pure cash flow -- $425 is a king's ransom to many teenagers. My focus was purely on cost: I visit this location at least twice per month and individual washes are $23.95. Buying in bulk saves me near $7 per wash or nearly 30%!

Now if I can just get my dry cleaner to offer similar discounts....