Most of the stuff we collect, is just without any personal value. Like those billionairs with 20 cars and 5 homes.
What truly matters are the achievements that have a story to us, in my case the Hand of Adal, I wear that title since years, despite having 50 or so.
My char outfit is that of mostly TBC and Vanilla gear, but I admit the neightborn set from Remix is a great addition, also because I like the addicts.
So to sum up, whatever they put on the trading post, it most likely won´t have any personal value to you, so having it or not, won´t make or break our WOW experience.