You can get a Korean Big Convoy for quite a bit cheaper than than the Japanese one (no difference in the actual toy from what I understand, just the packaging). Liqdeal on eBay has his own direct web store at toyarena.com where he sells it for US$40

http://toyarena.com/transformers-bea...oy-p-1627.html

I have some coupon codes that should get you $5 or 10% off. PM me if you need them.

EDIT: He might have more from your list too. I'm just not familiar with BW (except for Big Convoy).