1946 uniforms can be found 100-150$ But with good connections can be found cheaper.
To give you some idea, WW2 officers uniform was :
Officer pre-1933:
Officers post WW2:
Enlisted uniforms were similar.
I ve seen W German helmets here, interesting system, M1 shape with leather liner?
KW Korean war, US M-1951 system clothes can be found here in good shape.