It is worth getting back into Naruto. The secondary market for Naruto is there, since you can get cards cheap and sell them to others to cut margins.
The playerbase is steady and nice; comparable to the year before. It's still a great game. eBay is selling "boxes" (aka 24 blister packs) of sets like Weapons of War, Sage's Legacy, etc... for cheap since some singles are really hard to find.