When I returned to Guild Wars after a long break one of the first things I did was go to Mr. Razorstone and pick up his shield because that look is so unique. It took about 3 weeks off and on casually hero farming it. I sold it yesterday to someone and am now looking to get another one/ several more if it proves profitable. They made a couple statements that I'll share here.
1. They had been trying to get the shield for 2 years
2. They would buy more Tanzit Defenders
From my perspective it's not particularly hard to clear the mobs to get to the boss, although you have to go through one other zone to get to him. He's a guaranteed spawn with 9 spawn locations. I see Red Fireball is pretty active in shield market for this game and invite their perspective/ anyone else who has insight into this.