Might as well throw this out there but here's the following items I, rather insanely I expect, would love to get my hands on to finish off a few list variations on my guard and marines:
FW Valkyries x2 <- yeah right
-I have no problem using 3rd party (and in fact do) but I have an incorrect number for a last complete formation and hate to mix manufacturers inside the formation itself.
GW Space Marine Land Speeders x5 4th Edition
-really need one more formation to really maximize my marines as Raven Guard
GW Space Marine Bikers x5
-Realized I actually do not own ANY of these (somehow)
Liken the above to make you rich beyond the dreams of Avarice
