all of their prices r $40.00
when in dragon history mode, smash rocks and things, u should find dragon balls keep smashing rocks in history mode until you find all seven then when in main menu go down until you see the word...
gghcvghckm dragonballz budokai tenkaichi3
i have unlocked him but i don't have the game any more but you unlock him in the gt saga
if you mean how to unlock bardock then i think you need to kill buu,super buu or frieza