well it all depends on the condition of the "game boy", I got mine for $20 because it was a limited edition game boy, it all depends on the condition and the edition of it. A good place to get a good low price game boy is "games n'go".
if your buying them new it depends on the type of game .if your buy used it depends on how rere the game is
The new games can run more than retail cost and there are a number of used games Gamestop wants $20 and amazon used games start at $5
Used Nintendo 64 games range from ~$1 up to ~$90 depending on the title of the game.
Depends on the condition and game title sometimes shipment cost are higher than the game's price even when purchasing from online businesses and not individuals
See related link for current amazon,com pricing on 6 different game versions The used games trade in value will be listed for games amazon is buying
PSP games cost $20 the new ones cost $30 - $40.
Amazon sells the PS3 game for $31.72 and Xbox 360 for $ 34.55 used games start at about $10 less
It is free with a new game or must be purchased with used games at the Playstation Store see related link
$50/60
129.99 but if you want a game with it it is 159.99
$30 for a used one.
25$