...I understand that this post is in fact a year old, but, theres no way that he sold this for 4,536G to someone with Hero fame.
I have Hero, and the price is 1,462G. Sandy is in first right now, but, I've checked while they were in Second and Third, and the price has been the same since I reached Hero status.
Not a guild, so his prices are'nt going to fluctuate, and I know that there was no change made to the item or this NPC in the last year.