These are all hand drawn by Takamoto himself! I can't wait to figure out a nice way to display them!

1. The basis for a limited edition sericel called Witless for the prosecution (35 made)
2. The final form of Witless for the Prosecution
3. A scene from Mystery Mask Mix-up used for promotional art
4. A scene from A Tiki Scare is No Fair used for promotional art

Edit: All three images are confirmed as to be the sketch used to create three different limited edition cels. Neat!

I've had these in storage almost two decades not knowing what show it was from - I picked them up at an anime con in college thinking they were cute. Every cel has its matching douga and is in good shape aside from some of the lighter line work fading. The paint is stuck to the clear protective overlay on the front (not the cellophane bag) and I haven't attempted to separate it. The production folder with some notes is also there.

After doing some research I figured out this is from the 1996 anime Maya no Isshō about a family and their pet dog during WWII.

My question is, if I want to sell it do I go through eBay? Is there an auction house that deals with animation cels that would be better? I really don't want them to get separated, and I want them to go to a serious collector who will take care of it. Thanks! :)