The point made by omarte is that if other extensions for that name are available, then it is unlikely it has value. If it is a sought after name which most are taken, it is rare you will find a .com available as well as the other extentions; .net, .org etc.
So in summary, when considering what the price of a domain really is, if almost all of the extensions are available... the name probably stinks :td:
Good Luck!