I have five or six full sets of the Series 5 gumball ducks (25 ducks each).  They do not include the green biohazard or pirate ducks that were released in Series 4.  
 
I have one incomplete set from which I can do individual ducks -- other than that I'm trying not to split sets for now.  That may change if there's little interest in full sets.  
 
I try to sell in order of quality of paint jobs, so if you still need these, act fast  .
 

I'd like one! (I'll email you)

If you're interested in splitting the set(s) I would also be interested in a few.