Some get deleted because the seller contact a Mod to let them know it was sold or a change of mind and take off the market. Others floating for years - there are a few that come to mind that have had the same ads for years but make no attempt to change anything. Same car -same price. Same part- same price. Hey when it's free to post - why change ? They really don't want to sell it anyway - do they ? It is what it is.