Amazon offers the WaterWipes Baby Wipes 60-Count 12-Pack for $36. Order via Subscribe & Save to cut it to $34.20. With free shipping, that's $2 under what you could expect to pay for the same quantity in local stores. They're chemical-free and purport to help avoid diaper rash.
Be sure to cancel Subscribe & Save once your order ships to avoid being billed for subsequent shipments.