They already did, to an extent. The base Mac Mini used to be $600 with a 256 GB SSD, but they got rid of that and now the cheapest option is the $800 512 GB model. The typical Apple strategy is to make the base model of a given computer the price competitive version, and price gouge on additional storage and RAM to build up their margins. I guess the RAM price increase made the margins on the $600 model too low for Apple to want to sell.
I said “$600” in a comment about the Neo. You said “$600” twice here about other things.
One thing is for sure, people consider that Apple hardware starts at $600.
They are not raising prices. They are keeping them low (in marketing) to outcompete others like Microsoft (aka Valve).
Gabe Newell worked at Microsoft for 15 years - people need to start considering Valve an extension of Microsoft. Their unofficial App Store for games.