Some good prices:
Civ IV- $9.99
http://gamersgate.com/index.php?page=product&what=view&sku=DD-CIV4
Age of Booty- $4.99
http://www.gamersgate.com/index.php?page=product&what=view&sku=DD-AOB
Beyond Good & Evil- $4.99
http://www.gamersgate.com/index.php?page=product&what=view&sku=DD-BGE
Civ IV- $9.99
http://gamersgate.com/index.php?page=product&what=view&sku=DD-CIV4
Age of Booty- $4.99
http://www.gamersgate.com/index.php?page=product&what=view&sku=DD-AOB
Beyond Good & Evil- $4.99
http://www.gamersgate.com/index.php?page=product&what=view&sku=DD-BGE