Newbie here! How do I unlock dual spec?

[ZebraStrike]

i go into to the trainer to unlock dual spec but only see a description saying what it does?

[OhieMitzen]

Level 40, 1000g.

[andr3tankian]

why so expensive?

[OhieMitzen]

Ask blizzard. If it makes you feel any better, they made it cost less on later expansions.

[Drkwispurr]

why so expensive?

It's not expensive. Leveling in northrend gives you a lot of gold. At least when I was leveling few alts I managed to reach 5k gold or so, but that was long time ago however...