I have Barbosa on my Southampton save, great young player. I sold Clyne for 17m to Liverpool, Ramirez for 24 to City, Schneiderlin for 14 to Liverpool and Lovren for 7.5 to Liverpool (I instantly bought Kelly for 7m, who has better stats all round stats and will improve). I hate selling my high potential players but getting decent money gives you the chance to bring in 2 or 3 similiar players. My Saints team are disappearing now! Will not sell Shaw, Wanyama, Ward-Prowse and Chambers though.
I also sold Clyne for 17m but to United, I got 35million for Schneiderlin from Arsenal too
One thing I need to stop doing is buying injury prone players, I bought Ruiz at the start of my second season and he has literally been injured 3 times already! Lallana always seems to get injured also.