I really don't have any holy grails...
In the past 6 months, Every late G1 figure I've wanted, I've obtained. In the future, I aim to get my hands on both a complete & in good nick Liokaiser and Dai Atlas for reasonable dollars. Being as they pop up from time-to-time on Ebay, I wouldn't really classify them as pipe dreams/holy grails as they are realistically obtainable.
There's always a way...(besides winning lotto
)