How to sell better?

Level 2
I signed with OfferUp o July 18th and almost a month and half I sold only cheap tablet and I am very disappointed.
Is anyone can give me some advice how to sell better and more successful, thank in advance for your suggestion.
Level 5
Make sure to be completely honest and open and transparent about ANY defects. Also, take plenty of pictures of the item with good light so that all angles of the item are clear. Have a thorough and detailed description of the item.
Level 9

@Mikegt22 another suggestion for pictures is not to take pictures with clutter in the background. Create an area for picture taking so it looks more like a professional took the picture! Good pictures can sell your product by them selves. Also be careful about selling seasonal items out of season. Good luck and success!