Rajesh, I've been following this thread closely, and when I compare images from Tony or Bobby vs your images, your images suffer from excessive sharpening + excessive De-noise. This presents the gear in poor light (pun unintended ) and might even scare away prospective buyers if one gets the impression that this gear needs so much PP.
So it makes me wonder - what merits so much mangling of the image? Is it a bad copy of the lens or a bad sensor or poor bird approach technique or a bad monitor?
Do try to tone down the processing, maybe you can take advantage of the excellent Photo Critique forum to learn some PP tricks, if your gear and monitor is all ok.
) and might even scare away prospective buyers if one gets the impression that this gear needs so much PP. 