How much is this black nylon prada bag with plastic handles worth?

I have a black nylon prada hand bag with hard black plastic handles. I can't find it anywhere on google or ebay history.... I am wondering if anyone knows about this model? Perhaps it's really old or something. I am 100% sure it's authentic Prada.|||Plastic? I know prada introduces nylon in the 80s but I doubt they would go so low as to plastic. Where did you get the bag?