Amazon offers the Genova Yellowfin Tuna in Pure Olive Oil 5-oz. Can 24-Pack for $34.26. Order via Subscribe & Save to drop it to $32.55 and bag free shipping. That's $1.36 per can and $13 under what you could expect to pay in local stores for this quantity.
Be sure to cancel your subscription after your order arrives to avoid being billed for subsequent shipments.
Update: It's now available for Prime members only.