I took a week long course about 5 years ago at New Horizon Computer Learning Center. The cost then was about $1,200 I think and included the test. It was a small class and I thought helpful but the people that came in there knowing nothing were lost quickly. The test back then had Win 3.0 and 95 questions, it has changed since then thankfully. I would say if you learn better in a classroom than on your own, it is worth paying out the money. I think the Exam Prep and Exam Cram books are very good.

I've thought about going for the Network+ test and have books for it but haven't pursued it yet. The Server+ also looks very helpful.