I wouldn't say online doesn't have any advantages. At least with Target Sports, the Prime membership will help keep the cost below what you can usually find in a local store, even with tax added on. Plus the UPS guy drops my ammo off on my porch which reduces how far I have to carry cases of ammo...
...I also noticed that the shipper is FedEx. They must have dumped UPS and gone back to FedEx. Can't say I'm sorry, UPS damaged 75% of the shipments I got from Target. The boxes were destroyed but so far I haven't found any damaged ammo.