No, they didn't. I lived in Dallas when that happened. The Cowboys were God awful. People were looking forward to a rebuild and shocked than any team would give up that many picks. This was an INSANE deal:
Players/Draft Picks Received by the Minnesota Vikings
RB Herschel Walker
Dallas's 3rd round pick - 1990 (54) (Mike Jones)
San Diego's 5th round pick - 1990 (116) (Reggie Thornton)
Dallas's 10th round pick - 1990 (249) (Pat Newman)
Dallas's 3rd round pick - 1991 (68) (Jake Reed)
Players/Draft Picks Received by the Dallas Cowboys
LB Jesse Solomon
LB David Howard
CB Issiac Holt
RB Darrin Nelson (traded to San Diego after he refused to report to Dallas)
DE Alex Stewart
Minnesota's 1st round pick in 1990 (21) (traded this pick along with pick (81) for pick (17) from Pittsburgh to draft Emmitt Smith)
Minnesota's 2nd round pick in 1990 (47) (Alexander Wright)
Minnesota's 6th round pick in 1990 (158) (traded to New Orleans, who drafted James Williams)
Minnesota's 1st round pick in 1991 (conditional) - (12) (Alvin Harper)
Minnesota's 2nd round pick in 1991 (conditional) - (38) (Dixon Edwards)
Minnesota's 2nd round pick in 1992 (conditional) - (37) (Darren Woodson)
Minnesota's 3rd round pick in 1992 (conditional) - (71) (traded to New England, who drafted Kevin Turner)
Minnesota's 1st round pick in 1993 (conditional) - (13) (traded to Philadelphia Eagles, and then to the Houston Oilers, who drafted Brad Hopkins)[
You really can't compare this to anything. Not even the hindsight aspect of it. This was instantly shocking, and an obvious fleecing of Minnesota to anyone with a brain.
Dallas won 3 Super Bowls that day.