For Aggie Alley, they do pull around the first week of February. For students the price is $100 and it's $150 for non-students. They also added a damn processing fee this year. $9 for non and it was less for students (don't remember how much)
The way the pull works is everyone who has had a spot in Aggie Alley before, goes in pull #1. If it is your first year, you go in pull #2. The pull is just what it sounds like. Your name goes into a box and they draw names. First name pulled gets the first pick of a spot in the Alley, second name gets second pick, and so on. Once everyone in pull #1 is done, then those in pull #2 get the left overs.
Something new they started this year is rewarding loyalty to the Alley. Those who have had a spot for 1 or 2 years get their names in the pull one time, 3 or 4 years get their names in the pull 2 times, 5 or 6 years - 3 times, 7 or 8 - 4 times, and so on. So the more years in the Alley, the better chance you will have to picked early.
HTH