Today Raspberry Pi announced more price increases for all Pis with LPDDR4 RAM, alongside a 'right-sized' 3GB RAM Pi 4 for $83.75.
The price increases bring the 16GB Pi 5 up to $299.99.
Despite today's date, this is not a joke.
I published a video going over the state of the hobbyist 'high end SBC' market (4/8/16 GB models in the current generation), which I'll embed below:

  

But if you'd like the tl;dr:

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Raspberry Pi has announced new price increases driven by LPDDR4 DRAM costs, pushing the 16GB Pi 5 to $299.99 and a 3GB Pi 4 to $83.75. LPDDR chips now account for the majority of board cost across SBC vendors. The author argues the hobbyist SBC market is dying as high-RAM boards become unaffordable, new board launches have slowed (only Radxa showed some cadence recently), and even mini PCs have crossed $250 for 8GB models. The author is shifting toward older SBCs and microcontrollers, and worries smaller vendors won't survive the prolonged pricing pressure even if Raspberry Pi can weather it through its microcontroller and industrial business.

DRAM pricing is killing the hobbyist SBC market