Beast Wars Scavenger/Transmetal Inferno
Complete Seacons (don't care about MISB as long as the toys themselves are complete, in good condition and with all their parts/accessories)
Beast Wars Rampage (Japanese or Western version)
As many 5mm post weapons as possible!
(Current) HOLY GRAILS:
Full Hercules set
MP-03 Starscream (Japanese version)
Complete G1 Trypticon