"Sell all your crystals to the Npc"
wait what? lol
They would have less than 100g, and crystals sell for 1000-5000g a stack. yeah it will take a few hours but takes 30 secs to list them while you do everything else.
Probably due to me being on less populated servers but I rarely have AH slots just to throw up 1-5k Items. I normally am trying to sell more expensive stuff in those 7 ah slots then a stack of wind crystals for 2k, even in my early game play. I normally just don't bother with small amounts such as this as I feel it detracts from my enjoyment of the game but if you enjoy getting the most value for the items you get to drop you can spend lots of time trying to get the value out of all the stuff you get early game in addition to crystals. bee chips, bat wings, etc...