I dont think very many people will buy unid armor anymore thanks to faction. You'll have difficulty selling them (especially the purple one which can contain a minor rune).
a little secret tip, try to sell all the unid golds that arent 40 armor. the ones that have armor of the lower 30's are generaly purple runes, but most people dont know that. identify the 40's and sell all the other ones together, like 20k for 7 Unid Gold Armors.