Disagree...because there are already rumors that Burnitz will be dealt. His value plummets if he gets traded. Veterans on non-contenders get traded, and once the season is lost for Colorado, and Burnitz might very well be their most tradeable guy.
As for Finley, you can't sell him high. Unless you're dealing with a dimwit, you won't get a Top 20 guy in return. For whatever reason, Finley is one of the most underrated roto players of all time, year in and year out. He'll hit his .280, hit his 25 HR, steal his 15 bases (maybe more across the board) and maybe help win you a title. Guys who contribute numbers in all five categories have great value...keep him.