Hmmm... well.... I don`t think that it is that great.
I have seen as good and better movement scripts (with melee) in AUM for free.
Besides: If you want to sell your stuff watch for the content of your demo... when I tried your demo and "attacked" an error said that there is the staff.mdl missing.
I don`t want to be rude but I don`t think anyone will buy it.

~Gurke