tl;dr: An interactive dataset tracking historical memory prices ($/GB) from 1960 to 2026 across DRAM, NAND flash, and HBM, extending John C. McCallum's classic dataset with monthly updates from Keepa (Amazon retail) and quarterly HBM estimates from Epoch AI. It breaks out DRAM by generation (SDRAM through DDR5), HBM by generation (HBM2e through projected HBM4), and includes a modeled accelerator cost breakdown for Nvidia, AMD, Google TPU, and AWS Trainium. Raw CSV data is downloadable; caveats note that "cheapest retail" often reflects EOL clearance rather than leading-edge pricing.