Amazon [amazon.com] has for Prime Members: 14.5-Oz Amazon Fresh Diced Tomatoes (No Salt Added) at 4 for $3.44 - 5% off when you checkout via Subscribe & Save -10% offwith 10% off on any 4 qualifying items = 4 for $2.93 ($0.73/Can). Shipping is free.

For reference, Walmart has their brand can for $0.96 (link here [walmart.com])