"Shipping not included; flat-rate fee of $9.95 for 8x12 option, $11.95 for 12x18 option, $13.95 for 16x20 option, and $16.95 for 20x30 option to continental U.S"
The $13.95 shipping fee seems to apply to the $25 option, not the $19. Are you sure that shipping is free for the $25 option?