Bryant needs a new agent. If he did this without his agents knowledge then that is an even bigger issue.
Bryant hasn't played football in over a year and this year can't get any simple production out of a stacked offense and you are demanding a trade? Who in their right mind would give any type of equity for a suspended, disgruntled, rusty player on the end of a rookie contract?
Plus receivers who leave PIT in bad graces usually don't perform elsewhere. (See Santonio, Wallace, etc.)