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 3 months.

Item - cost - (average cost in recent events)

Lucky Stars

Charm Materials Pack - 100 - (118)

Myubuku Gift - 13 - (12)

Medium Refine Rune - 20 - (34)

Roshi - 213 - (213)

Mei - 87 - (95)

Danzo - 67 - (102)

Sakura's Gift

Orochimaru (Akatsuki) - 50 - (53)

Naruto Sage - 75 - (103)

Han - 200 - (230)

Masked Man - 150 - (178)

Advanced Refine Rune - 30 - (36)

Purification Rune - 10 - (17)

Purification Protection Rune - 15 - (16)

Charm Materials Pack - 125 - (118)