Clear photos get more calls. You only need a phone and daylight.
Shoot outdoors in the morning or late afternoon. Avoid harsh midday sun and flash, which wash out colour.
Photograph the actual lot, not an old picture. Buyers trust honest photos and ask fewer questions.
Move close, keep the camera steady and use a clean background such as a sack or tray. One wide shot and one close-up is enough.
Include a photo of the full stack or the bags so the buyer can judge how much is available.