Sellers=/=Sold

Unfortunately you can't get a suggestion through with only sellers, you need solds to show that people are willing to buy the item for your suggested price.

Items such as paints and strange parts are complicated, since the majority of sellers are restockers, meaning that they constantly buy and sell while leaving their trades up for months. In order to properly track sales for these trades, you will need to look at the bp history. Take a look at a previous suggestion of mine on this paint for an idea: http://backpack.tf/vote/id/5516c57fb88d88bb0d8b4575.

Also, to keep track of solds of regular items, I suggest pasting the links into some sort of document, and tracking them there. It is much more convenient than using outpost bookmarks: http://prntscr.com/75zzcv. Another method is to check the backpacks of open outpost trades and see if they have sold.