I have some extra waves 5,6 for sale $11CAN and wave 4 $10CAN or trade. I haven't had a chance to check exactly what I have. Once I do I'll post a list. But in the mean time just let me know what your looking for and I'll see if I have it.
I know for sure I have some:
slash/slice
bats 3.2/bats 4.0
tunnel rat/razor claw
shipwreck/eels
wildbill/coil crusher (repaint)
and almost all of the wave 4 figures