Let's say I decide to draft M12 M12 M12 on magic online and lose horribly, thus winning nothing. What are the chances that any of the cards that I rip make up for the $4 price of a pack? Has anyone compiled a median value for a booster pack?
The following rares are currently selling for more than 4 tickets on MTGOTraders:
Chandra the Firebrand
and a few foil rares (also foil Timely Reinforcements, interestingly enough). Note that this is the sell price, not the buy price, so most bots will buy for less than the list price here. Also note that this is still pre-release, so they have nowhere to go but down.
I'm not liking the odds; you'd better just win.