Those are pretty darn cool. Judging from the look of the Turtles, I can see that those cels are from sometime after season 8.
I have an animated cel drawing of Skeletor from Masters of the universe. I would will very willing to trade with you for that one of Rapheal (he's my fav turtle) with his sais, the last one you have post. Just wanted to throw that out there in case you're perhaps interested. It's cool if you're not though.