For me, I would probably look at the current sales prices across a mix of websites and comparison shop to get the most accurate value of my Magic: The Gathering cards
This spoiler follows a trend established back in March, where Final Fantasy cards are spoiled on the in-game birthdays of the characters they portray
Buy on eBay: Amber 1 Baloo, von Bruinwald XIII Rare 2 Bernard, Brand-New Agent Rare 3 Chernabog, Evildoer Super Rare 4a Dalmatian Puppy, Tail Wagger Common 4b Dalmatian Puppy, Tail Wagger Common 4c Dalmatian Puppy, Tail Wagger Common 4d Dalmatian Puppy, Tail Wagger Common 4e Dalmatian Puppy, Tail Wagger Common 5 Joshua Sweet, The Doctor Common 6 Kida, Atlantean Common 7 Kida, Protector of Atlantis Legendary 8 Lucky, The 15th Puppy Rare 9 Minnie Mouse, Musical Artist Rare 10 Miss Bianca, Rescue Aid Society Agent Common 11 Mr
You kill a thing, sometimes you lose a mana, sometimes you gain a couple, it is all generally pretty fair stuff