I f ranging from good to excellent, here's my 2 cents worth
1988 Scanlens $130
1989 Scanlens $80
1990 Scanlens $80
1991 Scanlens $70 (Mt set $100)
1992 Regina $30 (Mt set $40)
1993 Regina $45 (Mt set $60)
I haven't ever come across the 1988 / 1989 / 1990 / 1991 Scanlens sets but the Stimorol ( everyone loves a smart arse ) ones for those years seem to fluctuate in price and unfortunately downwards lately. The prices above from Mischa and Rey seem about on the mark to me.
The Regina releases, as a result of these fluctuations can be hard to put a value on, as people's opinions differ so it is supply and demand and luck of your timing when selling.
There's a 1992 part Regina set (102 cards. box and wrapper) up to $40 on Ebay it seems high but maybe there is some extra interest in the box.