Dolls are not on sale Cyber Monday- or at least have not been in the past. (Last week's 25% off everything Cecile/Marie-Grace was pretty much unpresedented.) Sometimes they do offer package deals, so much off if you get doll and a couple identified outfits, etc. It's usually oufits/accessories that are on the way out. (Eg Kanani things not likely to be on sale.)
FYI- Cyber Monday starts at midnight- Wisconsin time.