User blog comment:Backwardy/Should I cull the herd?/@comment-5477177-20121112041916/@comment-5200570-20121115154917

They crystal price was based on the purchase price for crystals in the dino den. So if someone is planning on saving tier 2's for this they only would need to save the most expensive 3(ish) tier two dinos to maximize profits with tier 2's. Primarily the Raptor, Arche, and now the Ingridia, and Skelesaur that have been introduced since the promo would be the only ones worth keeping for high returns. I was hanging onto a couple tier 2 raptors and arche's but they've since moved to fusion fodder because of my lack of space and need for the new tier 3 ghosts.