Just this week I received in the mail a 1992 USA Suggested Retail Prices folder. It only shows the base price and (some) standard equipment.
Effective 11/1/1991
K1 $13,690
K100LT (1991 model) $12,990
K100RS $12,990
K75RT $9,990
K75S $8,990
K75 $6,390
R100GS $7,490
Paris Dakar R100GS $8,490
R100T $8,990
R100R $7,990
All models subject to freight/destination charge of $180.00.