Its cheaper to buy an eurorail pass by internet or at an european country?

Please note that prices in Europe are about 20% higher than outside, and not all Passes are available for sale in Europe.Its cheaper to buy an eurorail pass by internet or at an european country?
Buy it online before you go to Europe. Check both

http://www.raileurope.com

and

http://www.eurail.com

One of them last year had a special and gave an extra day's travel for the same price.

If you live in Europe now, you can't buy these Eurail passes.
you should note that the interail pass does cover more countries than the eurail oneIts cheaper to buy an eurorail pass by internet or at an european country?
If you live outside Europe you can buy a Eurail pass, you best buy them before coming to Europe, through the net or through a travel agency.

If you are a resident of Europe, (have been a resident in Europe for more than 6 months by the time of starting) you can buy an InterRail card, better value and valid in more countries. And there are also 3 or 6 days in a month passes for the individual countries.

Again buy it where you live before you start traveling. (Not valid in the country where you are a resident, 50% reduction to the border.)

Eurodomino has stopped working recently, but several countries offer country wide passes that are valid for visitors as well as residents.