No one will be able to provide an intelligent answer to this question. It all depends on the condition of the vehicle, which you did not list.
Give this site a try,
http://www.nadaguides.com/Classic-Cars
Behind Locked Doors - 1948 was released on: USA: 3 September 1948 (Hollywood, California)
Behind Locked Doors - 1948 is rated/received certificates of: Australia:M USA:Approved (certificate #13276)
Behind Locked Doors was created on 1948-09-03.
Suicide doors are doors on a vehicle that is hinged on the opposite side so the doors close to the back of the car. Cars that feature these doors are the 1966 Lincoln Continental and the 1948 Plymouth Sedan. The suicide doors were discontinued because of safety issues.
True Value was created in 1948.
There was no 1948 New Zealand Halfpenny minted.
There was no 1948 New Zealand Crown minted.
Assuming you mean a British shilling, about 10 cents or so. 1948 shillings have no silver and are very common.
Priceless.
The value today, of 10,000 dollars from 1948 will be about 99,500 dollars. This is estimated at an interest rate of three and a half percent.
50-250
Very little value... they were made in their thousands !