To add to the debate, I must respectfully correct Maklyr's "two number"
theory. You do only need two numbers to buy credits.
1) You need to know the lowest price on the credit market.
2) You need to know how much gold you have.

That's it. If they're too expensive for you, I suggest you begin to
notice the movements of vermin.

Selling at 2350, 15 sold in 7 seconds,
Yig

Penned by my hand on the 12th of Scarlatan, in the year 336 AF.