Maternity clothes

Why are you sooooooo expensive!?!? $25 for a pair of shorts. Had to get two pairs because they were buy one get one half off. Then tank tops are 12.99. I saw some for $20 a tank top!!! At least a cute dress was $29. No one has been selling small maternity clothes on the yard sales pages near me. They are all large and xlarge. I will get much bigger but I know I won't fit in the bigger sizes. It's expensive to buy clothes for myself now. I had to get some because I ripped a pair of my jeans today ): and none of my shirts fully cover my belly.