finally something i can help someone with!!! From experience I've noticed guitar amps hardly ever go on sale. but web sites like guitarcenter.com and musiciansfriend.com do infact have Black Friday specials!!! (I'm almost positive its 20%)
if i can recommend, look for a "line 6 spider 3" amp. its perfect for anyone who is learning/home playing and there is practically an unlimited amount of different guitar effects to choose from. (Be sure to check out the $200+ price range for the best sounding amp)
I would purchase the amp through musiciansfriend.com because if you need anything or any help they are VERY helpful and reliable!
:) hope this helps!