3) Dwight Gayle – Peterborough to Crystal Palace for £6m
In 2012, Gayle was still playing for Bishop’s Stortford in the Conference North. He bagged a modest 13 in the Championship last season, prompting Palace to ludicrously break their transfer record for his signature. Although he’s scored once this season, Gayle was never going to be a player capable of dragging Ian Holloway’s side away from the relegation zone.