I usually just did this when my hearth was down, and I needed to get to a capital city in Azeroth for some reason, so it was on my way.
I switched realms and haven't ever made a druid (or an enchanter) since so I don't know how it is now, but enchanters probably still need it!
Limited supply items like this one are just pure money making gold and although they are "rare" I tend to see new ones appear every 30 minutes to an hour. So next time you respec your druid or if you're leveling one be sure to check the trainer whenever you get a chance for the Runed Arcanite Rod recipe. I sell them for 24 gold a piece and as many as three per day on my small server. Your mileage will vary based on competition and server size.