It really depends on the quality of ball you're looking for. These might be similar to the ones you're talking about, but they are terrible quality. The exterior of the ball is plastic, while a real baseball is made from leather. In soccer terms, it's similar to a glider replica instead of an official match ball.

If you're looking to buy baseballs, it'll be rare to find a place online selling a single baseball. This is an individual Major League baseball, but they're kind of pricey. It's up to you on what kind of baseball you're looking for.