This is going to be pretty straightforward, but I think a npc that brings up an auction house window upon being clicked would be extremely useful. Standard player shops are nice, but an auction would bring a new level of excitement and chance to buying. A minimum buying price or starting bid should be set, and then the amount of time before bidding ends should be able to be set...1 hour, 1 day, 1 week, whatever. Then, when the time ends, the seller gets the gold, silver, whatever it's worth, and the highest bidder gets the item. Is this possible? Comment if you like this idea or have suggestions to make it better.