Question about the sales?

Yes.

It varies. The last day of the sale, they usually bring back the most popular deals from the rest of the sale. If you missed something you really wanted, chances are it will come back. That having been said, I don't believe there will be any surprises since most of the sales that day are repeats. Lastly, you're not likely to see any price glitches or double dip discounts because they're just going to try to lure in everyone who missed something they wanted. Hope this helps to answer your question.

Okay thanks. I will restrain purchasing things I missed, until the final day.