I can only tell you why "I" remove the listing price after I sell a knife. Knife collecting is an enjoyable hobby for me. I often find it difficult to let go of a particular knife. When I do, I evaluate the knife (overall condition). I look at what it cost me new (or previously owned) when I bought it. I then decide what it is worth for me to let it go. Sometimes my set price might be higher than many people want to spend, other times it might be less than people would figure it might be worth. I don't feel it is my job to help others set a price for their knives and I don't want to contribute to setting a "norm" on what a previously owned knife is worth. I think sellers should do that themselves. Buyers should easily be able to find out what a particular knife cost new. The price of a previously owned model can vary greatly depending on overall condition (which is very subjective). Additionally, one person's vision of mint or like new can vary greatly from another person's (as evidenced by a number of threads here in the feedback section). Removing the price after the sale might not be appreciated by some, but that's what I do. As for pictures ... I always leave the pictures in the listing thread until after the buyer receives the knife and tells me that all is well. That way, there is little debate as to the condition of the knife (as I tend to take detailed pics). As soon as the buyer tells me he/she is happy ... I remove the pics and close out the thread. Again, can't say why others remove prices and pics ... this is just the way I do things.