The Magic Librarities

I was digging through my old cards and I stumbled upon this Arctic Wolves that has it's mana cost as 2GG instead of 3GG. I may have more than one, but I'm not sure. Is anyone familiar with this error, and/or know how much they are worth?

All Korean arctic wolves have this error. I'd say they are worth between $5 and $15.

Squt

...and I'm still looking for one in mint condition
Chris