If you recently bought a Nespresso capsule system machine, or looking to buy one, you will need a supply of capsules from day 1 if you want to use the machine. Nespresso has great online service. All you have to do is register online and you can start ordering capsules online. It usually take 2 days to arrive.
Get them at the Nespresso website.
Each capsule costs 0.55 USD. Capsules are ordered in multiples of 50 for packing reasons.