Need some help with my first board

Hey, I'm new to the world of surfing and actually wanted to get my first longboard. I found a board that is actually good for the price ($100) but I don't know if the dings and wrinkles in the bottom of the board (pictures attached) are a bad thing. The top looks good to me. So if someone can tell me if it's OK to buy it, I'd really appreciate it. 
