Generally speaking any of the '80's Fisher speakers, which would include the ST and STV series, don't have much of a following in the vintage collectors' world.
This was long after any connection to the original Fisher company had faded away, and the speakers had become pretty generic.
Keep in mind that although they have no significant dollar value to a collector, and they're not in the same league with more desirable speakers from a sound quality perspective, there's absolutely nothing "wrong" with them. They work fine, and they sound fine. They just weren't totl then, and they aren't now.
Afaik, there are no web sites dealing with Fisher gear from that time period, and I don't collect any catalogs or other ephemera later than the early '70's.