I have already posted about this but will post it again
I'm sorry but making legendary weapons not tradeable or sellable in marketplace will ruin the apb marketplace. More over in this game there are many spheres that players are using, for example making Symbols, Cars, Themes, Songs and also trade, exchanging of legendaries. Its like removing one of this spheres.
Exchanging, Trading legendary weapons in apb reloaded was always one of the most important and interesting part of the game. It will be very sad to most of us seeing it locked away. I'm sure there are more players who will agree with me.
I suggest to improve the trading system instead of removing the legendary exchange sphere completely.
There are many players who waiting for a better trading system instead of locking legendary weapons to account bound.