From a 1998 catalog (but I cannot find prices in the 2001 catalog onwards), a top of the line top of the series DDA-120 (1 GHz and 8/4/2 GS and 16/8/4M for 4/2/1 channels respectively) is $41,990 and an entry level 4-chanel unit (9304C - 200 MHz/100 MS/50K per channel) is $6,290 along with an entry-level 2-channel unit (9310C - 400 MHz/100 MS/50K per channel) is $4,990.