It might come in handy for the people looking at the auctions to have a picture of the actual item they are bidding on.
There is a big difference in seeing a picture of the item as opposed to a picture copy/pasted from a website. Imagine yourself buying a car, where all you get is a picture cut out from an advert in a magazine, and not a picture of the car you have been offered. Would you buy it?
Your auctions would most likely go higher if you knew what the items your are selling really are. Here I have the Mediator in mind; there is a big difference between a Mediator PCI 1200 and a Mediator SX...
