Frozen Orb exchange

This is for Wotlk+ expansion.

1. Buy from ah Frozen Orb (on my server the price is 20-30g)
2. Go to NPC
3. Exchange Frozen Orb on Eternal fire (on my server the price is 40-60 g) or other item from NPC which costs more on your ah.
4. Profit on one item you can earn 10-30g or more. If you buy more you could have better profit.

On 10 items you can earn 300g but demand on Wotlk eternals can be little.