When recording their GPS trajectories or posting geo-tagged
content on social networks, people produce social spatiotemporal
data that can be stored and shared, namely geosocial
data. Much of these spatio-temporal data can be used
by organizations and applications, for statistical analysis or
to provide services that are based on data. By letting people
sell the data they produce, to different consumers, both
sides can benefit. Thus, we present here a visionary idea of
a geosocial marketplace where people and organizations can
sell, buy and exchange geosocial data, that is, trade with
spatio-temporal data pertaining people. We discuss the involved
challenges, such as how to define supply and demand,
pricing data, privacy issues and measuring the amount of
data being exchanged. We explain the importance of the
approach and its applicability. We believe that the proposed
vision could motivate followup research in the area
of sharing and exchanging spatio-temporal data as well as
determining appropriate price points.