On December 2nd, the Sonos One will be on sale for $50 off ($149).
The One SL speaker will be marked down $40 ($129). If you don't want a voice assistant on your Sonos speaker, this might be the device for you. It's nearly identical to the One, but it's microphone-free.
You'll also find the Play:5 on sale at a $100 discount ($399).
EDIT: Also available through Amazon, B&H Photo and Best Buy.
EDIT: Corrected title.