Should you find 3 you're happy with, but wish to have a second Role to swap to - for instance a mage with one damage role, and one healing role, then the first additional role costs only 30 gold.
Should you be a rogue, with a spec you want to keep, but you also want to try a new one - and actually purchasing the 2nd Role is actually cheaper than constant re-rolls in the long run - then REMEMBER TO GET THE TRAINING FOR THE NEW ROLE.
It makes hell of a difference to go from say, rank 2, to rank 5 :/
*hangs head in shame*
