Is she looking for beads that look like pearls or is she looking for something else??? Pearlized could mean a lot of things. I do most of my purchasing through the local craft stores, such as JoAnn Etc. or Michaels. (Even Walmart sells beads.) I wait for sales. I buy specialized items, such as crystals, watch faces, and sterling online.
I would suggest going to a local craft store first, so that you can look at the items. If she finds something she really likes, then you can look around online and compare prices. Sometimes an item might appear cheaper online, but add in shipping, and its a wash.
With beads, texture is also important. I like to actually see and hold beads before purchasing. Pictures don't always do justice.