How do I tell if a rutabaga is fresh?

I recently bought a rutabaga from the store, having never done so before, and every single one on display had an oily feel to it - not sticky, but slick like it had been coated in a soft wax.

Is this how a rutabaga should feel when it is purchased? If not, what should a rutabaga feel like, and how can I tell if it is fresh?