Anyone who tells you preparing for the LSAT is easy is lying.
After our first client finished her LSAT prep with us, she had grown from an average score of 172 to 180 in two weeks. However, she had already spent two months on her own self-study, and was a far cry from where she started: leaving 10 questions unanswered on the analytical reasoning section.
LSAT self-study is the cheapest of all preparation techniques: if you have the self-discipline to stick with a training schedule, a decent classification system, and some solid prep books with strategies for your weaknesses, you should have everything without too much expense.
In fact, there are two, free sample PrepTests that LSAC has published as Adobe .pdf documents, one from October 1996 and a newer one from June 2007.
We even have free, interactive explanations for the analytical reasoning sections, otherwise known as logic games. The October 1996 PrepTest was updated with a new reading comprehension section when the comparative passages were added, so both tests are pretty good study for the real deal.
Below we've made two different itemized budgets--based on how long you plan to spend on your LSAT prep--you can use to help gauge the effect on your debit account. If you click on the images it will link you to their Google document, and you can see how to search for the materials and develop your own schedule by watching our Zen How to.