Of course we have. If we weren't, we wouldn't have lost Strachan, Rougvie and McGhee straight after winning the domestic double. We wouldn't have earlier sold Archibald to Spurs, or even earlier with Buchan, Graham and Harper all going South after the Scottish Cup win of 1970. Leighton left and even Snelders, Wright, Jess, Glass etc. We are in a position, and always have been in a position where there will always be far bigger fish who can take away our best players. Of course, some of our best players - you mentioned McLeish and Miller - will make the choice to stay, but in the main, our players will jump ship.
Whether that is because of the amount of money offered for the player, the personal terms offered to the player, the career prospects of the player improving or if it's for all of those reasons it still amounts to us being a selling club. There isn't a team in Scotland - the OF included - who isn't a selling club.
I said earlier that we stopped being a selling club for a time, but that was tongue in cheek because with the "talent" we had no-one in their right mind would pay for them.
Unless Trump puts a veritable fortune into us, we will never stop being a selling club.
I'm not really sure what point you're trying to make here. What "2nd chancers" or "young run-arounds" have we gone for and not signed? Did we not just sign Charlie Mulgrew a few months ago? Mark Kerr looks a solid signing and there have been flashes that Gary McDonald could be a good player for us. Sone Aluko would maybe fall into your category of "young run-arounds", and I'd say I was pretty pleased we signed him.
Serious question - who or what are you expecting us to sign? Are Mulgrew, Kerr and Aluko not good signings?