Should I buy this?

Okay, so there's a game I like. I play it with my friend during night time. The game has an expansion DLC that offers three characters from the game. However, it costs $8.99. For an Indie game, that is pretty expensive. It's a 最近 expansion so it might not lower in price. Out of the three characters in the expansion, I only really like one of the characters. I was playing the beta game and I'm able to play that character for free. So far, he is my お気に入り character in the game. I can't play the characters in the normal game unless I get the DLC. I don't really have much money, so $8.99 is expensive and to be honest, very overpriced. Should I buy it anyways in hopes that the one character will be completely worth it anyways?