Way OT but for you Nikon DSLR (DX) users, if you ever want an inexpensive, fantastically sharp and fast lens, look no further than the Nikon 35mm f/1.8 prime. While it is not a zoom, it will work great for product type shots as your subject is static. What makes the 35/1.8 so appealing & versatile is that it even works well as an impromptu portrait lens as its focal length comes in right around 50mm (if you aren't full frame) and you can take advantage of that huge f/1.8 aperture.
At $200, it's a tremendous value. It's also so small, it makes for a super lightweight package for those of you with the small camera bodies.
For reference, I will spoiler a variety of examples from quick family/kid portraits to product shots.
Warning: Spoiler! (Click to show)
These are virtually un-processed.
Obviously you wouldn't always want that blurred background for your product/ebay shots but this $200 lens give you the option of shooting at f/11 or f/18 for your ebay studio and later using it wide open (f/1.8-2.8) in low light or for kids that don't stand still. It's a small investment with a huge payoff.
Edited by patrick_b - 6/29/13 at 1:29pm