Thanks for all the comments and opinion votes.
This is a messy problem and any "solution" would be messy as well. Hillsideshortleg made a funny, yet accurate example of how messy it could get. The Value forum is a good example. We separated the value questions away from other forums because of their growing number and because the questions were annoying some people. But some of the people who were annoyed continued to choose to go to the Value forum to see the things that were annoying them. We know so well that we can't please everyone.
Posting pictures and determining a value is, and will continue to be, a challenge for those who are just trying to sell a couple items found in Grandpa's barn. If we make a hard and fast rule that everything has to have a price and a picture, we run those new people off. Then we would hear complaints like, "The For Sale section has really dropped off. There aren't the number of items like there used to be." And we'd take a chance on losing our For Sale Moderator, who would get tired of the constant intervention for meeting the requirements.
The sellers who post items with no picture and no price, get what they get. A bunch of requests for pictures and a price, low ball offers and most likely, fewer people interested enough to take any action at all.