Samuel Umtiti, starts at Olympic Lyon, I picked him on a free around them, can't remember whether it was 13/14 or 14/15 though. Wouldn't have thought he'd be expensive either way though. Solid CB, average rating of 7.5+ the 3 seasons I've had him, chips in with a few goals a year too. I'm in 19/20 now (playing as Liverpool) at age 25 he's valued at £15.75 million, not bad for a free!
Possibly Wallace at RB, but I dare say he's quite pricey then! I signed him when he had a £4.4m release clause, just sold him for £16m, as I have a ridiculously good regen (22 year old Argentinian, natural at RB and WBR, valued at £30m).