Hello, ive been using this technique for a while now, all you have to do is ask a guard to guide you to the Inscription shop, and speak the the vendor, The vendor sells a unlimited supply of [Dust of dissapearance] ] This dust costs 10g each, and sells on my server for 30g at the AH, so thats a 20g profit doing basically F**k all ^^
Have fun, but i guess this depends on your server economy