I also, am often troubling inserting links or images!
I try, this should be the item You found:
It is a GREAT Lens; beeing "D" version, here in Italy it is quoted 250-300 in EUROS as USED one;
You can sometimes find it by less price, yet. It beeing an Objectiv in production still,
sells by 500 EUROS or less about, as BRAND NEW from shops. (Nikon Italia prices it E.575;
but those are prices which shopkeepers use to apply discount on).
Since the piece You are looking at, I understand it should be NEW,
its price too, seems as affordable.
Also the "Rebate Available $ 40.00" is right as declared by nikonusa on it.
However, shooting at a 15x15cm set, also through the 28-80mm
(setting it on "Macro", by pushing a button and turning the ring)
You should be able to get better results.
But if Yours is one from newer "G" version, it has not the f/stop ring (3.3-4-5.6-8-11-16 ..)
and You must select the diaphragm on f/11 through the Camera body.
On the other (not G) classic version, instead there is a slide which may block the diaphgram
as set on its minimum aperture (to work in "S" mode); and You can not turn the ring, if so.
Any model of 28-80, however You should check if inside the lens, diaphragm works, too:
set the camera on a long expusure time (some seconds or "B"=bulb) and look close at
the frontal-lens; shooting, You should see a round of blades coming from
the border to the center, inside the Objectiv.
If nothing happen, either the diaphragm is not properly selected/set
or there is any problem on the contacts between the Camera body and the Objectiv;
contacts may be cleaned with Lens-cleaning paper.
If diaphragm is ok, try focusing manually, too; Autofocus might misunderstand, in Macro set.
Don't forget, to manually focusing properly, the equipment must be set on "Manual Focus":
there are slides on the Lenses or on the Camera bodies, to do it.
Otherwise, if You simply turn the focus-ring with Your hand, but while the Autofocus System
is still allowed, it AF will be quickly acting as soon as You shoot the picture!
And focus will not which You wanted.