Also, many small museums aren't "art" museums with semi-independent objects that have similar value to collectors anywhere. Many of them have some sort of focu

Also, many small museums aren't "art" museums with semi-independent objects that have similar value to collectors anywhere. Many of them have some sort of focus on the history of a place, person, community, people, industry, etc., and much of the value of the artifacts they house comes from the process of curating and contextualizing them to tell us a story about the past. Because they're telling a story, they may also have replicas of artifacts they can't obtain which hold narrative/educational/illustrative value but fairly little collector value. Another common genre is something like a house, restored to and preserved in roughly period condition. When these exist because a "significant" person or family built/owned/lived in the house, they'll likely try to obtain genuine objects they can connect to the people there. But they'll of course fill it in with other instances of objects they know the family owned, replicas, and best-guesses. The person or family may only be locally significant, and the artifacts may have little independent commercial value. The main thing of value is likely to be the building itself.