It looks like you're new here. If you want to get involved, click one of these buttons!
There is a thread about this on Guru but I know not everyone here goes.
It costs 15 silver to respec which is around 25 minutes of playtime in a level 15 area with coin/loot drops. In another comparison an hour in a level 30 dungeon was worth roughly 50 silver plus inventory loot.
I like the price myself its not to high but it gives some consenquence to the choice. Another intresting thing is the yogcast guys said the amount of money your earning doesn't really scale up as much as you would think and that they felt it was down because of the down scaling when a high level goes into a lower zone. If you got alot less money you'd have less incentive to go to the lower areas.
How do you all feel?
Link to Elizabeth's Q&A where she address the trait respec cost.