BriaR
Favorite Answer
There is an old saying that applies particularly well to photographs:
"You can't polish a turd!"
No matter what you see in Holywood movies a bad photo is a bad photo and no amount of processing will make it good.
Take the photos again...
Sumi
Post a few shots so we can suggest how to reshoot them better.
Try this: Set up a table next to a window that faces North. Okay, not everyone has a window facing North, but choose one that has diffused light coming through as opposed to direct sunlight. On the table put a white cloth down and have it lifted at the back to cover the background. You can tape the cloth to the wall using painters tape. Use painters tape to prevent pulling off the paint when you remove the tape.
You can place a small box under the cloth which acts like a stand for the product. Next place white board (foam core works very well) on the other side of the table so that it bounces light back towards the window which will help even out the light from the window.
Place the item on the table. Then with your camera on a tripod set it so that built-in flash is turned off. Use a focal length of at least 50mm or greater if you can. Once your focused, use the camera's self timer (set to 2 seconds if possible) or use a remote trigger to take the photo. What you don't want to do is press on the shutter button to take the shot without using a self timer because you'll move/shake the camera when pressing the shutter button.
This should yield images more than good enough to post on eBay. Heck, most people just plop their stuff on a table and shoot it with their phone.
Night
Nothing can fix whats already been done. You're doomed
...plus why you wanna post bad pictures anyway? You know better than that.