Tourney existed back then also. 200GS was kinda where Alivio is now. I had 100GS in 1990; it was mostly plastic coated steel, yet functionally good and with much trickle down tech for the era- rapdifire shifters, cassette hub, cogs with cutouts, biopace chainrings. It still has more modern tech than current tourney and functions better.

My advice: Don’t buy Tourney. Quality starts at Deore.