Hi, how fun to look at all the different rugs, you've posted both machine made and hand knotted rugs, most of the people who collect are into the hand knotted. There are so many variations on materials cotton, wool, silk, art silk...and so many countries of origin, it's nearly impossible to quickly learn if it's really what they say it is. The true silk/silk rugs are pretty thin and are not really good to walk on (I hang mine). Wool/wool or on cotton, if well made, can last for years. Look at the back for knot count and flaws, don't rush, price around and learn what you can before buying. Sometimes these rugs are overpriced and misrepresented, but with some leg work you should be able to learn what to look for and buy what you can live with. Good luck!!