To answer your question, no, those are not good enough to sell or to use.
Problems
1) They are very blurry
2) There is only eight of them
3) They are small (show larger ones with more detail in previews.
4) They are not seamless
Suggestions
1) Try to get or borrow a better camera
2) Make more textures
3) Make sure that the textures are at least 512x512
4) There are various ways to make them seamless in photo editing programs and I suggest you get a cheap or free one to make them seamless
Good luck making more textures and segments.