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Collectors are a diverse bunch. Some are in it for the aesthetics, adorning their windowsills and gardens with the colorful glass pieces, adding a touch of sparkle to their surroundings. Others are more specific in their tastes, seeking out particular kinds of insulators. The prices can range from freebies to jaw-dropping sums. Rare specimens can fetch tens of thousands of dollars, but there are also plenty of budget-friendly options. You might stumble upon one for less than a dollar or, if you’re lucky, even score one for free at flea markets.

It’s worth noting that most of the insulators in the hands of collectors are between 70 and 145 years old, and some types haven’t been produced since the early 1900s. Anything old and no longer in production tends to become a collectible, and insulators are no exception to this rule.