You might just have something there - simply because of the existence of collectors of AD&D stuff and Star Trek stuff. Autoduel and old flight sims also have their rabid fans, as I recall.
I wouldn't think any one item would be worth more than $10, though. Only way to find out would be to go for eBay.
"There is much pleasure to be gained from useless knowledge." --Bertrand Russel (attributed)
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