I agree: Depends on the camera.

These days, not much. $50 is my limit.

My most expensive film cameras:

-- The new Zeiss Ikon rangefinder (new)

-- Zeiss Ikon Contaflex TLR

-- Zeiss Ikon Contarex Hologon Ultrawide

I bought them to use, not to fondle.

Before it's all over, I would still like an Alpa.