If you're after a new car then I think James Bond's Aston Martin is the one for you. It's up for sale and you can own it - guns and armour plating, the spec looks fantastic! From Autoblog:

The 1964 Aston martin DB5 driven by Mr. Bond in the movies Goldfinger and Thunderball will be sold at RM Auctions' Vintage Motor Cars in Scottsdale, Arizona, on January 20th, 2006. The Aston Martin includes a pair of non-firing .30 caliber Browning machine guns, a wheel-mounted tire slasher, an oil-slick ejector and a smoke-screen system...Unfortunately the ejector seat was replaced with a standard non-ejecting seat.

That is so cool! Imagine driving around with that, although I'm not so sure the tyre slashers would be road legal...and didn't it have a rotating number plate? That's definitely not.

Also up for sale at the same auction are Al Capone's armour plated 1928 Cadillac and Hank Williams 1964 Pontiac Bonneville with pistol decorations! Nope, still sold on the gorgeous Aston Martin of Mr Bond's.