Every team buys and sells, you're taking the "selling club" tag too literally. Eboue for example was a member of your first team squad yet I wouldn't use him as an example of selling club as you wanted rid, just as we did with the players you listed.
but you included Flamini who is was only really a starter in one season, we wanted to get rid of Adebayor and Toure because of the reasons I have previously mentioned. I am not trying to wum you my point is merely that it is unfair to say Arsenal are a selling club when the same points can be said about Spurs as has been shown with your players who at the time were the best players in your team.
it can include players who occupy the same position, its not based on the amount of games they have played but if they Have been selected as part of you first team by your Manager