Abstract: Distribution and redistribution methods and systems. A data-base stores rights allocation information, e.g., purchase or allocation records for tickets to an event. A system receives a request that may be satisfied, or partially satisfied, by reallocating rights from a first party to a second party in the database. A probability that the request will be satisfied is calculated and the party making the request receives an indication of the calculated probability. For example, some implementations include adding, responsive to receiving the request, an identifier for the second party to a queue and calculating the probability that the request will be satisfied based at least on a position of the identifier in the queue. In some implementations, a server receives a request from the second party to acquire tickets to an event, where the requested tickets must satisfy one or more conditions, e.g., location, number of seats, etc., and the server determines that the request cannot be satisfied.