A number of stores offer used equipment pages too, like hi-fi heaven, Ambrosia, Audio Consultants and more.
In the past I've aggressively followed several of these services/forums and over the years have purchased three pairs of mint condition, slightly used speakers at 50% to 65% off of list. Very good experience. Good for amps, preamps, and DACs too. Audiophiles tend to take very good care of their equipment, and like to upgrade. This creates an excellent used market for buyers.
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