Gold standard has a free one here and they sell a pack of 10 cbts for $150. don't know whether you can get them individually and they're notoriously difficult.
Difficult and frustrating. There were usually 3-4 questions per BS section I could argue to death b/c of how poorly the questions were posed or how poorly the answer choices were offered.
Here is a strange, hypothetical, although fair in my estimation, example:
Let say a passage describes smelliness as a function of some amine-derivative, compound x, and they provide the following table.
Table 1
-------------
Object under study...................Compound "X" Concentration
Feet......................................[0.000201]
Butt......................................[0.000203]
Mouth...................................[0.000296]
Shoes...................................[0.000426]
Then you can have a question that could ask "what is the smelliest part on the body" a) feet, b) butt, c) mouth, d) shoes. You say, well, it can't be d because shoes aren't a bodypart, so it has to be mouth.
Then you'll get your test graded and you'll find out later the answer was shoes.
Then you'll post the problem in the forum and "Dr. Ferdinand" will say: "well, clearly, compound X had the highest concentration in the shoes".
And you say: "but the shoes aren't a bodypart".
And he'll say: "Well, I'd argue that it is considering they spend most of the time attached to your body. And even then, you've got to be prepared for the ambiguous questions that the MCAT will throw at you."
Then you say: "Thanks, but this isn't ambiguity, its just plain wrong"
And he'll say: "Well, clearly we will disagree here, but the important part is that this was a learning experience."
Oh, and the VR is GS is too easy to make matters worse.
Okay, rant over
