How much are the cabbage patch kids worth?

If you own any of the soft-head CPK dolls made by Xavier Roberts, those dolls are very much in demand (especially the ones made in the early 80's) and I have seen them fetch for over $500. If your daughter owns the ones made by Coleco or Mattel, they do not fetch as much (maybe $30 if it is a rare configured doll with the box).