elite*gold course

What's the official course for elite*gold? For an example how much is €5?

~ 300 elitegold at the black market.

There is no official rate. You have to trade with the community prices and it's variations.
Atm it's about 550 = 10€ I'd say.

You can buy 260 elite*gold for 10€ from our system. That's what I would call the "official" exchange rate.