I did something similar two weeks ago, and almost took a bath on a semi-key Lincoln. I loaded the wrong picture (1912-S listed, 1912-D picture), and did not notice until there were bids placed and there was less than 12 hours remaining. I tried to make a correction, but
ebay's policy is that no changes can be made if there is less than 12 hours remaining. I got a couple emails informing of the wrong picture, or saying that it looked more like a "D" instead of a "S", which they were correct. In the end I did not lose out too much, somewhere in between the two in value. Education is expensive, and I learned the hard way, slow down and get it described right!