If you want to make some clints, it's generally better to wait until the day a new group of cards comes out and buy a new blood pack in the hopes that you get some of the new cards. The demand for the new cards will be high on the marketplace, so you're likely to be able to sell them at a much higher price.
Wait for a new clan before buying. New cards will sell for 400,000 dollars in 12 seconds
He also said "dollars." My guess is that he was making one of those joke things, where you exaggerate for effect.
Yes, I was exaggerating and referring to Meet the Heavy. Still, they will all be expensive, no matter how bad they are.
Not sure what pack has better chance of getting a new clan. Depends on whether elite picks cards from the total pool or picks clans first.
If all cards of a given rarity are equally rare, New Blood will likely have 4/50 of the new clan. And the optimal Elite pack would have 4/89. So in that light you'd be better off with NB alone when you're hunting for the new clan.