can I buy the game on line?

The following link will take you to the main Babylon 5 RPG page on the Mongoose website. It shows all the currently available products, follow the links to each product and click on the Add to Cart button.

You could also try the usual online booksellers like amazon and such like but the lead times are often much longer from them as they usually have to get it in from their distributors whereas Mongoose are the source.

Hope this helps . . .

LBH has them, well whichever your national version is should have them.
If you're in the UK:

And we have it in stock at the moment.