Allowing trades would really put a hamper on the transfer market.
Also, as Forrest said, being only able to trade within a certain salary range also defeats the purpose of trading in the 1st place, especially when a mechanism (the TL) already exists for transactions of this nature.
There's just too much foul play that can occur with trades for them to be worth the minimal benefit that is derived from allowing them.
NO ONE at this table ordered a rum & Coke
Charles: Penn has some good people
A CT? Really?
Any two will do
Any three for me
Any four will score
Any five are live