Game program has a procedure for determining item price (IVD), for
respectively computing price for transfer of a plurality of items to be
used in a game every each item, and a procedure for executing the
procedure for determining item price when possession state of the item is
likely to be changed in the game, and the procedure for determining item
price has a procedure for computing price for transfer of the item on the
basis of individual data concerning each item and for displaying the
computed price. The price for transfer of the item is determined and
shown, changed by the individual data concerning each item, so that the
player can buy or sell the item with reality similar to economical
activities in the actual world.