After seeing some of the horror stories about buying the glasses from Gravity Trading, I was a little unsure about the purchase.  Since it was less than $10, I risked it and went with Private Island.  The glasses are actually really good.  They aren't great, but the equivalent of what you would find in a mall.  I only wear them when I drive, which is good because they feel pretty light and fragile.  As far as other reviewers being disappointed because they "weren't chrome" is pretty stupid(but the world is full of stupid people right?)  They do have a real mirror finish and are really dark.  They aren't chrome, but then again I don't remember anyone or anything saying they should be.  The picture for this product is pretty spot on. Just as a side note; finger prints seem to be more noticeable with these than traditional sun glasses.

Pros; Dirt Cheap, As advertised(Dark with Mirror finish; silver frame)
Cons;  Pretty light weight(Probably not a con for everybody, but they do feel really light and fragile)  Finger print magnet.

Overall, you get what you pay for.  If you just want an extra pair or a pair for occasional use, you can't go wrong with these.  However they feel a little too cheap to make a gift.  I would buy this product from this seller again.