It looks like this year they've had a 10% discount off the cheapest model. So that's ~$40 off. I think it's worth waiting the 9 days for the Halloween sale to see. If not, I'd be very surprised if it's not on sale for Autumn. I would be surprised if any of these sales have a deeper discount than any of this year's earlier sales though.
If you plan on replacing the SSD, those will probably go on sale around Black Friday. It would kind of be a pain to settle in with the Deck and get everything set up and installed how you like just to replace the SSD a month later.
I saw that blip but figured it was just some sort of weirdness in the data. It says it was sold at $319.99 but at "No Discount". So... Maybe? Seems weird that they would then put it at 10% again afterwards, but idk.