This is another bit of internet-writing-memorabilia akin to Michael Martone's Leftover Water. However, whereas the sale of Martone's water was laden with obvious writerly artifice from start to finish, it seems possible that the assortment of crystal hammer reviews may be born less out of a collective plan to create a postmodern essay or collection of stories, than a spontaneous response to the shear strangeness of the product.
However, this still doesn't come close to matching the fictional delight inherent to the products of merchant starry1_night on ebay. Though I may be close-minded. Perhaps there is nothing fictional about "offering authentic djinn on ebay since 2005."