I guess, I can offer my thinking, I did bid on it but didn't win it. I was reluctant to bid higher because of the following.
I didn't discover the auction until maybe two days before it ended. I e-mailed the seller for a description of the bore and more detailed pictures. But all I received was a statement that it was a good shooter.
It looks like it had been reblued, and without detailed pictures, you don't know how much the edges might have been rounded off by a buffing wheel.
Also, with Rock Island 1903's you also have the low serial number question. I personally don't have a problem shooting low numbered 1903's but I know that it can be difficult to resell them.