yeah, I bought about 1,000,000 bells worth last sunday. still waiting for nook to raise his prices. D:
I might have to sell my furniture to pay rent! D:
edit: also, the stock advertisement that is showing might be of interest to you.
Stock images are basically pictures of a certain object, environment, or even an entity. Stock pictures are also pretty high in terms of quality, so graphics makers sometimes use stocks to help set up an idea for a signature.
tl;dr Stock images are just a type of signature resource.