I've always had a soft spot for this Zombie Tree.
There's a lot of power here, but it's trapped in a casual, Timmy package.
Moves are being made on this card. The original Innistrad set is seeing increased demand due to the name-associated "Shadows over Innistrad", which also boosted Modern Zombies.
Anyway, there's only a single printing, and the Foils are now the same price as the non-Foils. This signifies casual demand.
I'm betting on Foils in the hope that this card catches fire in a Modern deck and spikes, sending the Foils to $5.00 or more (they're $1.00 apiece right now: this won't last long). Long-term, I think $5.00 Foils are almost inevitable.
Non-Foils are walking on the lip of the bulk bin, and some people might unload them around $0.40 or so. Buy those, too!