i was used to drink a lot of Absinthe, a pub near my home sells a little cup of Absinthe at 3 euro, and it is "La Fee" Absinthe, produced in France, and the only real absinthe.
THE ONLY REAL ABSINTHE is dark (smerald) green, has 70-72% of alcohol, is very very bitter, and is mainly produced in France and Czech Republic, there are many fakes selled as Absinthe, to trick the misinformed young guys that heard of the psycoactive Absinthe and want to try it
All the commercial Absinthe is chemically prived of Tujone, the psycoactive molecol that causes allucination, this because it is illegal in almost all countries.
The only way to have the Absinthe that was so famous in '800, is to make of your own, the herb of Absinthe is called "Artemisia Absinthum" (Wormwood) and can be bought online or from an herborist.
The ingredients and the way to make it can be found online.
THE REAL ORIGINAL Absinthe must be DARK GREEN, 70-72% alcohol! Trust me
There are even some Absinthe with less alcohol made to be easily selled, but there aren't the same thing of the original one
Here in italy is illegal to produce, but is legal to sell, so there are a few pubs that import it from France.
It tastes really really bitter, and tastes like "sambuca" because anise is used.
Don't joke too much with Absinthe, a friend of mine risked ethilic coma with 5 whisky cup full of Czech's made Absinthe, and he is an heavy drinker
Here seels "La Fee" Absinthe online
http://eabsinthe.com/
but it is very expensive, i bought some bottles of excellent absinthe in Prague this summer for a lot less
Hope i was useful, sorry for bad english