As I recall, the first one I saw sell on E-bay brought something in the $1500 range (probably empty as well). I guess bridges are more common the Ithaca oil cans.
Timothy, I believe James Tyson did a Double Gun Journal article were he mentions a small vial of 3/1 oil being included with a new gun. I have no information pro or con. I am sure they discontinued the practice when they started selling Ithaca oil. I have only seen one NIB Ithaca double, a grade 3E 20 ga. There was no oil present in that box.