OK, so that looks like a Toyota (North America) promotion where they collect your information and pass it on to your local dealer.
I searched for Serra Decatur Toyota parts (known to have big discounts during the year) and when I clicked on that dealers parts website it took me first to the Dealers website but in a split second it was diverted to the "Toyota Parts Center" website but linked back to Serra/Decatur Toyota.
A parts guru may know what that is about ie: some National coordination of parts sales??
There are however still a few individual Toyota dealers that offer 25- 30+% off year round. In the past there were more, seems like some have gone
to the "Special Promotion" model that offer discounted prices during set times in the year ie: like Serra/Decatur Toyota in Georgia (USA) did previously.
FWIW, in my experience if you're a regular customer at a particular dealer and ask for discount that can get you a discount any day.
Example: last week I needed one brake line (90947-02A17), the dealers list price was over $100 (SET, which is often above US Retail), the Toyota retail price is ~$81.50. I paid $65 (before taxes) which is ~ 20% off Toyota retail. So that might have been due to the National Promotion ie: I didn't have to go through the website.
One example (knock sensor) of discounted prices everyday: