Navajo Yei rug 36” wide by 27” inch tall

Hi, today at my local flea market I. Purchased this Navajo Yei rug It measures roughly 36 inches wide by 27 inches tall I would love to know more about this Navajo yei rug like how old it may be what it’s value may be and why are the yei faces so hard to see they do not appear to be sun faded but the rug does show slight minor sun fading in other areas also there are a few small holes and burn marks thank you for reading and thank you for your comments.