The biggest 'blockbuster' trade that I recall was the Eric Dickerson trade in the late 80s (Halloween of '87).
NINE players or draft picks involved
Rams trade Dickerson to the Colts
Colts trade the rights of Cornelius Bennett to the Bills
The Rams receive:
Greg Bell, RB
Owen Gill, RB
Buffalo No. 1 – 1988 (Gaston Green, RB, 14th overall)
Indianapolis No. 1 – 1988 (Aaron Cox, WR, 20th overall)
Indianapolis No. 2 – 1988 (Fred Strickland, LB, 47th overall)
Buffalo No. 1 – 1989 (Cleveland Gary, RB, 26th overall)
Indianapolis No. 2 – 1989 (Frank Stams, LB, 45th overall)
Buffalo No. 2 – 1989 (Darryl Henley, DB, 53rd overall)
So the Rams get SIX first and second round draft picks from the Colts and Bills, and end up with WHAT? LOL!!! A fistful of nuttin'
I'd say the Bills won that trade, as they went to four Super Bowls afterwards. Yet it was the Colts and Rams who could actually WIN one years later.
Links to some of the other 'big trades':
http://www.profootballhof.com/history/deca...c_dickerson.jsp