<p>I got a 5 on it, and I'm non-native. I'm a little bit of a different case though, since I was Spanish immersion in elementary school. I took math+science in Spanish up until 6th grade, then language classes after that. It helps a lot with grammar sometimes, since I can tell when words are conjugated incorrectly if they don't sound right. I don't have any trouble with pronunciation either. </p>
<p>If you're looking for things to listen to, see if you can find a Spanish language radio program in your area. If you live somewhere with a decent-sized Hispanic population, you may have a radio station. Listening to that will help you a lot. If not, see what you can find on the web. BBC may have news clips or videos recorded in Spanish. You could look. If not, poke around for streaming content, which you might be able to find somewhere. The more exposure you have to different accents, the better. </p>
<p>Our local station, 99.1, has some podcasts available on their website. It's not the best listening exercise ever (and I don't listen to the station much) but you will get listening experience. If they didn't clean it up for the podcasts, you should also get that lovely radio-caller distortion when people call in. The AP exam often has distortions in its listening sections that make listening harder. </p>
<p>Also, for the listening passages, they do interviews a lot. Often when they do, one person will speak at a moderate pace, and the other person will speak very quickly. The contrast can throw you if you haven't had experience with it. I would find and listen to at least one recording with this sort of contrast in it sometime before the exam. </p>
<p>Speaking of experience, listen to some speakers with accents from Spain as well. Depending on the accent, it can be difficult to understand if you've only heard Latin-American style Spanish. A movie might be good for that. La Lengua de las Mariposas is pretty good, as is Mar Adentro. I know you can get them from Netflix, but you might be able to find one or the other at your local bookstore. In its American release, La Lengua de las Mariposas is titled "Butterfly" and Mar Adentro is "Sea Inside", if I'm not mistaken. Both are pretty good films, but depending on your level you might need subtitles to understand everything.</p>
<p>As for whether or not the it's "worth it" for the OP to self-study: My impression is that OP is self-studying because she's interested in the subject, in which case it's worth it because it's something OP will enjoy and gain knowledge from, whether or not he/she gets a 5. </p>
<p>I have a number of other suggestions for listening, but I've already written a book in this post, so I won't put them up. Shoot me a PM if you want them.</p>