edit: Price dropped another $10.
EverythingKitchens.com has the classic Artisan Tilt-Head Stand Mixer (KSM150PS) starting at $229.99 with a $60 MIR in Silver Metallic (SM), $249.99 for Caviar (CV), and Pink (PK).
All the rest of the colors are at $219.99 after Mail in Rebate.
No tax, free shipping.
Best Buy, Target, Macy's, Amazon etc are excluded from the Mail-In-Rebate, making their price of $279.99+tax the lowest you'll find.