I would amend this to say, "I believe it's important to compare to the prices yesterday, ..." WITHOUT A SALE. Comparing to the Extraordinary Sale price or the Upgrade sale price is not informative to the general public. For example, I booked a $3000 cruise for $2000 during the Extraordinary Sale (cruise-only, no OLife or air); it should not shock anyone that the price increase by at least $1000. What IS interesting (at least to me) is that it increased by $1000 plus $400 which is equal to the am