This will give you a rough estimate of what the picks are worth. There are several different sites that produce these charts – most of them are very similar.
http://www.sportznutz.com/nfl/draft/draft_point_value_chart.htmI believe the Packers have 7 tradable picks in the draft, all at #28 in their respective rounds.
Note that the 28th pick is worth 1/3 the value of the 5th pick that the Packers had in 2006. The pick is worth ½ the value of the 9th pick in the 2009 draft.
Trading their first and second selections yields the Packers the 17th selection at best. Trading their first, second and third picks only moves the team into the 15th selection.
These are big numbers if you value position. Like last year, Thompson is starting from a tough spot on draft day.