These all seem to be the kind of lights (HP sodium, CFL) which are rapidly being replaced by the more economical LED versions. Maybe the bottom is dropping out of the bulb market.
Well the LED versions are more expensive upfront but saves energy and thus operating cost long term. It’s really a question of ROI and how long you can wait to break-even. You can always retrofit these casings with LED alternatives later if you wanted to.
The Small 50 Watt High Pressure Sodium Floodlight seems to be half this price on Amazon, assuming it’s model number 71060, which I think it is.