Nobody in their right mind is paying Motherwell £3m+ for one of their players. I've 'championed' signing Turnbull on here for months now as I think he has a huge future ahead of him. Had he played for the likes of Hearts, Hibs or the Sheep then the bidding would, as you suggest, start at £2.5m. He doesn't though, he plays for Motherwell. The bidding will 'top out' at £2.5m - if it even gets that high (would need the English to get heavily involved because no Scottish club is paying that for him). Sounds daft, I know, but it's the way things work in football.