Here is the rough cost in coupons to get the event points to buy one of the items and the average cost for that same item over the last year and 8 months

This week: Mega Carnival (shop), Summon Rebate, Daily Special, Lucky Board, Battle Armor Rebate, Lucky Starts Wheel

Item - cost - (average cost in recent events)

Poor Deals in Red

Good Deals in Blue

*** - Lowest Coupon Price I've Seen

Best Deals - Tobirama Edo - 87% of Average

Worst Deals - Medium Thread x3 - 117% of Average

Adv Thread x2 - 116% of Average

Naruto 6 Paths - 115% of Average

Myoboku Grasp x10 - 114% of Average

Yahiko Young - 113% of Average