One of my favorite sellers to watch just release a bucketload of Vintage Japanese G1 MI(S)B goodness:
Combaticons
MIB Scorponok
MIB Overlord
MISB Predaking Reissue
MIB Headmaster Kirk
MIB Headmaster Loafer
MIB C-114 Fortress Maximus
MIB Raiden (Junior?)
And last but not least, the reason I watch this guy, he has so many LioKaisers:
MIB LioKaiser Giftset
For all his other stuff: eBay ksgj03