Yes, there are some really good offers these days. However, we bought tickets 4 months before the journey. :) For some people it's difficult to plan that much ahead.
The website where we found this offer was www.novaturas.lt but in www.makalius.lt sometimes you can find even better deals. However, I think they don't have EN versions of their websites. :)
Aww thanks!! 🙌🏻