We just launched a new modification of Clintz purchase using credits.
Clintz packs have been removed from the Shop and have been replaced by an addon available directly in the Market. It permits you to buy Clintz with your credits by directly choosing how many credits you want to spend (1 credit = 200 Clintz).
The idea is to revalue direct card purchasing through the Market for those who don't enjoy the random side of characters packs.
We hope you'll like it.
I'm sorry for causing trouble with the packs section of urdb.kirlad.net
As Fraggle said, there is no way I can give a precise value for the packs due to randomness and card distribution. I have a vague idea of how cards can be distributed, but it's only speculation from people who posted the cards they got on packs.
As you can see there is a "beta" tag on the site, because it's a work in progress and I seriously doubt it could ever pass that stage. The idea behind this feature was helping to choose between packs, and it only works if you compare the flawed logic behind a pack value with another flawed logic of another pack, not with a real value like the new feature of the market.
And after all this explanation, take the randomness into account. You could get lots of clintz in a single pack, or as UM_AaaBattery got, just 300 clintz.