My Barnes & Noble carries the "...Actual, Official LSAT PrepTests" and there's currently a printable 25% off coupon out (good through 11/28). This should bring the price down below LSAC's. Or if you're sick of looking at PrepTests, buy a nice recreational book instead. Just thought I'd share in case it helps someone out.
- msconstrued (aka coupon queen)
ETA: As it turns out my Barnes & Noble charges full list price ($30) for the books of 10 PrepTests, so with the coupon & tax it came out to $24.xx, so it wasn't cheaper than the LSAC website, but certainly much quicker!