It is not a secret that the biggest concern of any store owner is how to make your customer to make a purchase:) And no matter what you sell, or what niche is your products. All people minds works alike, they do react on the same "psychological / emotional" Tricks:).ss
So here it is "Only 1 in stock" Module.
Even Amazon uses this trick knowing that if customer enter an inventory of less than 20 items, And product page will show potential customers the number of items remaining. Force Customers to make purchasing decisions and taking out their wallets a lot faster:)