I've seen Transformers & Thundercats cels on 
Yahoo Japan, and have heard there were a couple 
of D&D cels once, but it's quite rare and usually 
there's a pretty good bidding war, especially for 
Transformers cels. 

Celga.com or Rinkya.com are good for searching 
Yahoo Japan. But you end up just having to search 
through 80+ pages of cels. 

One warning about buying any older cels from 
Yahoo Japan, or from Japan in general. The 
majority of cels I have from Japan need some sort 
of restoration. Now I understand the cels are 20+ 
years old, and I'm not a stickler about line 
fading, but I've bought cels for extremely high 
prices only to find out the cels have cracked or 
chipped paint and/or need major cleaning that 
wasn't listed in the discription. I think these 
are just the cels left over and weren't cared for 
the way cels you can find from American dealers. 

Personally, I think eBay is the best bet for 80's 
cels, especially GI Joe, Tranformers, & He-man.

Kett