Magic The Gathering newbie. Need some clarification.?

[Kaminari_Koori]

I just inherited a ton of Magic cards from my older brother. I've only just recently gotten into the game so I know next to nothing about it. I have two Mons's Goblin Raiders (revised edition) without apostrophes. I read that this is a misprint, but I haven't been able to find out how common or rare it is or if it's worth anything at all, so I'm guessing it's a rather common misprint, but I'd just like some clarification.

 

[Noe diaz- weaver]

Well you can check the rarity of the card by looking at the symbol in the middle on the right hand side of the face of the card. Black means common, silver is uncommon, gold is rare, and orange is mythic rare. I am not too familiar with this card, so i don't know what it is worth. Go to your local card shop to have it looked at, or just go on ebay and look it up.