Birchbox.com has the amika Polished Perfection Straightening Brush - Rose Quartz for $90 (regularly $120 w/ 25% Cyber Monday discount today).
Free ship w/ orders $50 or more
No tax in most states (except New York, New Jersey, Massachusetts, Tennessee, Virginia, Washington, California and South Dakota)
Deal link: https://www.birchbox.com/product/32079
Stacks with Amex offer ($10 back w/ $50 or more spend) for a total price of $80
See reviews for this on Sephora: https://www.sephora.com/product/p...id:p414654