Just picked up a 2019 Grand Touring FWD in Snowflake White Pearl for $35,000. I really just went for a test drive, but the price was a lot better than I expected. MSRP is $42,085, so over $7,000 off (freak) ($4,335 dealer / Costco discount and $2,750 Mazda discount). I used the Costco Auto program to get the dealer discount, so I didn't even have to negotiate to get that price. I highly recommend trying it if you're a Costco member. Tax, tag, and title were $3,324, so total out the door including that was $38,324.
I believe the Signature would have been $39k and change through the Costco Auto program, but I couldn't justify $4k extra when I don't need AWD and actually slightly preferred the look of the Sand leather to the Auburn. I wish I had the wood though. It looks like the 2020 Signature will actually offer a new Parchment leather color that looks like the Sand leather from 2019. I would love that model, but I needed a car soon and it would probably be a long time before I could get a really good deal on a 2020.