Cards like Narset of the Ancient Way and Sorin, Grim Nemesis benefit from discarding a split card since it deals damage equal to the mana cost
Most brick-and-mortar stores have a fixed price for product, but you should ask for offers, discounts, and potential liquidation
Not responding to buyer inquiries or concerns
Its worth roughly 25 cents in its cheapest, traditional form according to TCGplayer market price
Not only does it give you a big creature and potentially draw you a card like the rest it also wipes the board, something thats extremely important in games of Commander
There are safer ramp options, in my opinion, in green: Farseek - Can take the place of Selesnya Signet Nature's Lore - Can replace Talisman of Unity Kodama's Reach - Can Replace Commander's Sphere I say replace, but you can always up your ramp suite by a couple cards instead.