Trading for TP or expansion codes

I've been seeing quite a few trade posts like this one lately, where people trade unique/named/rare in-game items for Turbine Points codes or, in this case, the expansion code. Correct me if I'm wrong but I believe these things can only be bought for real life money. You pay $$$ and pass the code, you get shiny loot, more or less buying-from-platfarmers style.
Needless to say, I won't have any of that in the guild - I've added it to the no-no things in our recruitment thread.