MyItemClass.cs

namespace MyGame {
  public class MyItem {
    public string Name { get; set; }
    public string Price { get; set; }
    public string Description { get; set; }
    public string Whatever { get; set; }
  }
    
  public class MyShop : Monobehavior {
    [SerializeField]
    public List<MyItem> ShopItems;
  
    public void MyShop(){
      ShopItems = new List<MyItem> {
        new MyItem {
          Name = "lockpick",
          Description = "a lockpick",
          Price = "$45",
          Whatever = "whatever",
        }
      }
    }
  }
}