I'd stick with the Taiga. The KOTR were reprinted and Grove is a card I wouldn't pick up right now unless I'd absolutely need it. There have been rumors of bans for Dec 20... I'd try to get more out of my Taiga, or something a bit bigger as a whole.
Keep Taiga, unless you're a Modern and Standard player. Taiga will keep it's value because it will never be reprinted, and KotR has already been reprinted. Grove might be banned, as mentioned above. With that reasoning, I would wait for Dec 20th.
If the store owner says that I can't trade in the premises, I'll just go outside. If he says that I can't trade within 10m of his premises, I'll go to 11 meters. If he says that he doesn't want to see me trading, I will put a basket over his head and continue trading.
Yes, he's a local legend. He's only known to take his clothes off before he goes into the Ladies' Lockerroom. Nobody knows what he does in there because he's invisible, but it's almost certainly tons of masturbating.
Fair Trade