The Dyson Ball Animal Upright Vacuum is available for $249.99 [Original price 499.99] on Best Buy as part of Black Friday sale!
There's more deals on the Dyson cordless vacuums here.
Dyson is offering $100 off on its V8 Absolute vacuum cleaner. As someone who uses this model, I can't recommend it enough. The offer is however, also valid on Dyson Pure Hot + Cool.