I logged in today with the specific intent of going through the sale items and making a semi-large purchase. But, the sale items are no longer showing on the front page...all I get are the bundles!

Where did the sale items go? I thought this sale was supposed to go on until November! :(

I see what you mean. When they do this stuff, it's sometimes easiest to just go through the regular store. This will get you to all of the current discounts:

https://www.gog.com/games?price=discounted&sort=popularity&page=1

GOG is buggy as usual.
The sale still have 4 days left, I do not think GOG really want to hide those items.

I can still see all the deals on the frontpage.

Maybe it was a temporary problem that was fixed