Daily-refresh e-commerce memory and storage price panel

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Daily-refresh e-commerce memory and storage price panel: catalogues in-stock new-condition listings (189 in-stock DDR5 desktop UDIMM kits on this page) reduced to $/GB and $/TB metrics, and published as TWO parallel indices — a 'shelf floor' cheapest-kit series and a matched-model index that compares each kit only against its own earlier price (base 100, >=175 matched kits per step). Stratified by a capacity ladder (32/64/96/128GB) with cheapest and median $/GB per rung. Sister series cover server RAM, SSD/storage trends and a TCO tool; prices refresh hourly-to-daily from the Amazon catalogue API with specifications taken from manufacturer datasheets.