what're you buying, stranger?

Burnout Paradise Complete, PS3 – £23.99 on PSN

That is the game, and every single bit of DLC released for it. If you already have the game, and want to get the DLC, for £15.99 you can get the DLC bundle.

DLC includes:
Party Pack (hotswap multiplayer)
Legendary Cars pack: Jansen P12 88 Special (based on the DeLorean from the Back to the Future films), the Hunter Manhattan Spirit (based on the Ecto-1 from the Ghostbusters films) the Carson GT Nighthawk (based on KITT from the television series, Knight Rider), and the Hunter Cavalry Bootlegger is (based on The General Lee from the TV series The Dukes of Hazzard).
Toy Cars Pack
Boost Specials
Cops & Robbers pack
and Big Surf Island

The disc version costs £14.91