FBA, or Fullfillment By Amazon is something I would like to try in the near future.
With FBA, you send your inventory to Amazon and they take care of shipping it out to customers. This makes your products eligible for Amazon Prime. From what I’ve read on it, they charge you a storage fee and still charge you a shipping fee, though less than you’d pay yourself.
Another benefit, sort of, is that you send a large shipment into them at once. This means that you can send Media Mail for a large box of books being sent to the fulfillment center and basically get a bulk discount on your shipping costs.
Once I’ve built up some inventory and tried this out, I’ll add a new post with my experiences.