Do items in the shops change prices? I could swear that http://wiki.cardhuntria.com/wiki/Items/Xander's_Boots were 3000 yesterday. Today they are 2500.
Item price is based on two things - your level in relation to it, and its rarity. Thus, it'll keep changing until it reaches its minimum price. 5 g for a common, 25 for uncommon, 100 for rare and 500 for epic and 1000 for legendary, I believe from the top of my head.