Well as the regular game comes on 3 DVDs I'm guessing either the DLC is on the 4th, or interspersed throughout the plot and they've shifted the points at which you swap discs. More likely to be the latter.
All I know is it comes on 4 DVD's.
I got the 360 version (in a nice cardboard gate fold case) for £17.99 in Blockbusters at the weekend.
Did the goty ever come out for 360 ? never seen it, and although it is advertised online, I have yet to see one "in stock"
L.A. Noire is £15 in Morrison's. 360, don't know about PS3
it did but availability seems very low
Stop messin' about
Is the dlc on a seperate disc ? if so, don't forget to sell it to your old mate Duffman when you have done.
Also you'll be waiting a long time. I don't sell or trade in my games even after completing them.