I have been saying they should try to trade Perk for the last couple of years, however at this point, it makes little sense unless some team offers something exceptional (like Battier).
Right now, Perk's value is at an all time low, and he brings a lot more to the table to the C's playoff run than he does in a trade.
So, unless someone gets desperate for a rental of a center and offers something amazing, the C's are better off holding on to him, and then exploring sign and trades this summer if they can't resign him to a reasonable deal.