This vintage, classic sports car is a 1951 Jowett Javelin (British). Soon it will be gone, sold by owner Frank Shirado of Mill Valley, CA USA.
The ad on Craigs List:
Jowett Javelin, brother to the Jupiter, is for sale—good for restoration. A 1951 model, the classic car made in Britain has the original flat head 4 cyl engine. 4-speed on the column, the sports car convertible model does not run and has been stored outside for a number of years. (See picture.) Please offer.
The car is standard, not modified and seats 2 (bench). The manufacturer made fewer than 1,000 of the automobiles. Not running, owner has extra parts, repair manual. May be able to find the original manual.
Owner must sell: Recession time price acceptable.
Original color of gold long gone, was bought by owner who at the time worked for British Motors, and though there may have been an original owner, so to speak, it was purchased “new” from the manufacturer who took on the complete line. It was stored by the British motor company for two or three years prior to the owner purchasing the car, whose original new price in 1951 was something like $1,000 dollars American.
Phone: Frank (415-388-6090).
UPDATE: The Jowett Javelin has been sold! (May 15, 2009 finalized, approximately.)
This article (below) is from Wikipedia, and more information can be found by Googling the automobile (sports car) name “Jowett Javelin.”
Note the owner believes this year’s model that is for sale was part of a manufacturing run of less than 1,000 cars.
The Jowett Javelin was an award-winning British car that was produced from 1947 to 1953 by Jowett Cars Ltd of Idle, near Bradford. The model went through five variants labelled PA to PE, each having a standard and "de luxe" option.
The car was designed by Gerald Palmer during World War II and was intended to be a major leap forward following the relatively staid designs of pre-war Jowetts. The flat four overhead valve engine of 1486 cc with a compression ratio of 7.2:1 was water-cooled and had an aluminium block and wet cylinder liners. It developed 50 bhp (37 kW) at 4100 rpm (52.5 bhp in the case of the PE) giving the car a maximum speed of 77 mph (124 km/h) and a 0-50 mph (80 km/h) time of 13.4 seconds.  Two Zenith carburettors were fitted and PA and PB versions had hydraulic tappets. The radiator was behind the engine. A four speed gearbox with column change was used. Early cars had gearboxes made by the Henry Meadows company, whilst the remainder of the cars had gearboxes made by Jowett themselves. The decision to make the gearboxes in house proved to be a costly mistake for Jowett.
Design features included aerodynamic styling with the headlights faired into the wings and, for the time, a steeply sloped, curved windscreen. The body was of pressed steel, incorporating a box-section chassis and was made for Jowett by Briggs Motor Bodies in their Doncaster factory. The suspension used torsion-bars on all wheels (independent at the front) and internal gear-and-pinion steering. PA and PB models had mixed Girling hydraulic brakes at the front and mechanical braking at the rear. Later versions were fully hydraulic.
The car had a wheelbase of 102 inches (2,600 mm) and a track of 51 inches (1,300 mm). Overall the car was 14 feet (4.3 m) long, 5 feet (1.5 m) wide and weighed about 1 (Imperial) ton (depending on model and year). The car was expensive costing GBP819 at launch. 
A de-luxe saloon version tested by The Motor magazine in 1953 had a top speed of 82.4 mph (132.6 km/h) and could accelerate from 0-60 mph (97 km/h) in 20.9 seconds. A fuel consumption of 29.1 miles per imperial gallon (9.71 L/100 km/24.2 mpg-US) was recorded. The test car cost £1207 including taxes. 
Just over 23,000 units were produced.