Nobody sets out to build a museum when they open an architectural salvage yard, yet a good yard keeps the physical past in a way a museum can't. It holds the actual working parts of vanished buildings, in use rather than under glass, and that accidental keeping is part of what makes salvage matter beyond the market.
A museum keeps the exceptional and the representative, chosen, labeled, and kept behind a rope. A salvage yard keeps whatever survived and had value, the ordinary fixtures, the working hardware, the everyday glass, and sends them back into service. The yard's collection is unplanned, driven by what got saved and what sells, but it holds a breadth of ordinary material a museum would never accession, precisely because it's ordinary. That's the yard's peculiar value: it keeps the common past, the fixtures and parts that filled real rooms in real houses, which formal preservation tends to overlook in favor of the grand. It keeps by circulation, not by stopping time. A museum removes an object from use to protect it; a salvage yard restores an object and returns it to use, so the past stays functional rather than frozen. The limits are real, though. A yard keeps only what survived and only what someone valued enough to keep, so it's a biased record, heavy on the durable, thin on the fragile, silent on whatever nobody thought worth saving.