Dumb questions: Where is mock and sample exams link?

I cannot find the link to 2010 mock and sample for purchase. Anyone can please help? How many sample questions there for purchase? are they both essay and mc? $20 each set right? How many mock there for purchase? I read on the cfa site, this should be free with registeration. is that ture? How to obtain them? Anyone has used them? Do you think they are helpful? Anyone from last year can tell us the predictability of these exams to the actual questions? Thanks much for help!

Can anyone help on this please?

http://www.cfainstitute.org/cfaprogram/resources/Pages/sample_and_mock_exams_overview.aspx All multiple choice aka item sets