Do you have links to your ads? (yeah, I am too lazy to search right now)
GOOD PHOTOS are the number one tip for selling. Keep them at 600x400 resolution so people do not have to scroll, crop down to that size if you want to show detail.
With blurry photos or no photos, many are leery of buying "sight unseen".
Next is have an appropriate price, look at ended sales (past page 6ish) to see the "going price", and mark yours accordingly.
Photos are the best way to move a product.