In 1964, LEGO released 4 Classic Vehicle sets, all of these sets have been retired. For that year, the total price of all retail sets cost $35, today those sets are valued around $3,186.
Most valuable 1964 LEGO Classic Vehicle set
323 Train $1,805.37
4 sets

303-2 Aeroplane

Theme / Subtheme Classic / Vehicle
Year 1964
Pieces 46
Availability Retired
303-2 LEGO Aeroplane
Retail $3.25

304-2 Tractor & Trailer

Theme / Subtheme Classic / Vehicle
Year 1964
Pieces 82
Availability Retired
304-2 LEGO Tractor & Trailer
Retail $8.25
Value $710.95
Growth  +8517.6%
Annual growth 7.5%

305-2 Fire Engine

Theme / Subtheme Classic / Vehicle
Year 1964
Pieces 170
Availability Retired
305-2 LEGO Fire Engine
Retail $11.25
Value $670.10
Growth  +5856.4%
Annual growth 6.8%

323 Train

Theme / Subtheme Classic / Vehicle
Year 1964
Pieces 253
Availability Retired
323 LEGO Train
Retail $12.50
Value $1,805.37
Growth  +14343.0%
Annual growth 8.4%