The board definitely looks old. I hate to tell you, but if it really is a '92 and you paid $200 for it three years ago, your buddy stuck it to you hard.
There really is no such thing as "classic" snowboards unless you're talking WAY old school like the old Burton Backhills or something. They really don't have much if any collector's value.
You should hold onto to have a beater board to ride in poor coverage conditions, not because it's a "classic".
If you're happy with the way it rides, that's all that really matters at the end of the day though.