I've looked into Pimsleur on your recommendation, but it's a little out of my price range, unfortunately. What would be, in your opinion, the next best?
Do they have it at any local libraries? If not, you could try downloading it from the web if that's something your ok with.
But you might not be able to find it anyway.
When it comes to language software, Michel Thomas & Assimil are the best, according to testimony I've read from fellow language-learners. Michel Thomas currently does not have a Lithuanian course. Assimil does but only in French. Asside from Michel Thomas & Assimil, Pimsleur is the best. I couldn't really tell you about other programs.
Maybe try the one that's the most affordable.