It is not legal to simply "order" Oxycontin® (oxycodone ER) without a legitimate prescription from a legitimate prescriber (who should only prescribe Oxycontin for a legitimate medical need).
OxyContin is a narcotic opioid (morphine-like) medication. It is classified as a Schedule II controlled substance (the strictest classification for legal medications) in the United States. As such, it is subject to regulation by the Drug Enforcement Administration (DEA). There are strict rules for obtaining OxyContin, and there are strict fines and penalties for selling, using, or trying to buy OxyContin (online or otherwise) without a prescription.
Some Web sites may allow you to order OxyContin without a prescription. In addition to being illegal, these illicit "pharmacies" may also be dangerous. Some people may think that you can buy OxyContin cheaply from the internet, but this is simply not the case. Buying OxyContin (or other similar medications) without a prescription is usually significantly more expensive than buying OxyContin legally.
(Click Order OxyContin for more information about buying OxyContin, to learn about the dangers of ordering this medication without a prescription, and to find out where you can buy it online from a legitimate pharmacy.)