PetSolutions.com currently has a sale on Instant Ocean, Reef Crystals and Kent Reef Salt, shipped to your door for free (assuming you spend $50). That's a pretty good deal. If you missed the sale that Great White had on Kent Salt, this is probably the next best thing.
Instant Ocean $38.99 200g box
http://www.petsolutions.com/C/Aquarium-Salt-Mixes/I/Instant-Ocean-Aquarium-Salt.aspx
Reef Crystals $44.99 200g box
http://www.petsolutions.com/C/Aquarium-Salt-Mixes/I/Instant-Ocean-Reef-Crystals.aspx
Kent Reef Salt $43.99 200g box
http://www.petsolutions.com/C/Aquarium-Salt-Mixes/I/Kent-Marine-Reef-Salt.aspx
It's always nice when they drop it at your house for you.
Instant Ocean $38.99 200g box
http://www.petsolutions.com/C/Aquarium-Salt-Mixes/I/Instant-Ocean-Aquarium-Salt.aspx
Reef Crystals $44.99 200g box
http://www.petsolutions.com/C/Aquarium-Salt-Mixes/I/Instant-Ocean-Reef-Crystals.aspx
Kent Reef Salt $43.99 200g box
http://www.petsolutions.com/C/Aquarium-Salt-Mixes/I/Kent-Marine-Reef-Salt.aspx
It's always nice when they drop it at your house for you.