Metal Gear Solid (PS): 350k first week, 780k LTD.
Metal Gear Solid 2 (PS2): 470k first week, 850k LTD.
Metal Gear Solid 3 (PS2): 494k first week, 860k LTD.
It looks like first week sales are a good indication of total sales for this franchise. LTD sales seem to be around twice the first week sales.
My Mario Kart Wii friend code: 2707-1866-0957