I would say that Adorama was precisely right in what they told you. . Physical appearance typically has no affect on the image-making abilities of a lens.
My 400 f2.8 looks "all beat up" on the outside. . Yet it is in excellent mechanical and optical condition. . The Image Stabilization works flawlessly, as does the autofocus. . And the optics are, of course, just as good as they were when they left the factory when the lens was new.
I wouldn't let the appearance of a lens' exterior affect my decision to purchase or not to purchase the lens. . What the lens looks like DOES NOT play any role in whether or not it is sound internally. . The little bumps and abrasions that cause the paint to get chipped and scratched do not cause any adverse affects to the internals of the lens.
Lenses are just tools, nothing more. . They are not collectors' items.
Some of my friends have pickup trucks that are all beat up on the outside. . Yet these trucks are mechanically sound and simply never have any drivetrain or suspension problems, nor any electrical problems. . They perform with marvelous reliability, despite being all dinged up. . It really does work the same way with cameras and lenses.
Yup you are right. But these were really Beat up. Kind of sad to think someone didnt take batter care of the gear so I tend to stay clear and pay a little more. I like the 7-8 range w/o a lot of cosmetic dings. I take really good care of my equipment but would jump at something if i could get a good deal.
Jake thanks for the link. I saw your review. I have more to think about