Diaper stockpiling?

Paige • 31.Married 9/7/15. Due with #3 4/5/21 💕

Any of you stocking up on diapers throughout your pregnancy? I've heard conflicting stories of women who stockpiled a certain brand and when the baby came the diapers that they bought did not work for them. I'm thinking about purchasing a gift cards throughout instead to use once we figure out what works best. Any thoughts? I'm wondering what store has the best prices? I'm thinking Target or Walmart.