I've managed to get a bunch of the old Atlantic NKE chariot sets.
They have charm but the wheels...oh, dear.
http://www.plasticsoldierreview.com/Review.aspx?id=71
This can be improved on with replacements. Once made by Baueda, they're OOP at the moment.
It needs only 63 people to re-vive the Egyptian ones & a few more for the Celtic:
http://www.dreamsstudio.com/baueda/20ATL1.html
Interested?