Having trouble with grand exchange.

I am a fairly new player, and I found that selling limpwurt roots is a decent source of gold. I have about 80 and I can't seem to sell them at the G.E. Has the price gone down, or am I just not waiting long enough? I have been trying to sell these for a while now. I'm selling for 2,000 each if anyone is interested. Add me. DukeFinch