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Try a site like: http://www.vintage-computer.com/apple2e.shtml
Practically speaking, the value is zero. It has a minor "museum" quality to it, but it's unlikely that any computing museum would want it. Any museum that had a use for it would already have it.
Outside of that kind of historic or nostalgic value, it has no real value because Open Office, Libre Office, Lotus Symphony and others are not only free but far more capable.