One thing to consider: Early on the prices of many cards, especially planeswalkers, will be inflated. Jace was at 40 and is already dropping. If you're looking for money, you'll want to open and trade away many of the money cards relatively quickly as they will decrease quickly in value. A good example of this was Narset, Transcendent in Dragons of Tarkir. The card was $45 for several weeks, then plummeted to its current price of $7.
EyeclopsNarset, Transcendent wasn't standard playable. Jace, Nissa, and Liliana all very much are, and will likely maintain their current price for a while.