It's been said before, but transfer fees often reflect the value of a players current conract, and until we start paying our players more we cant expect to demand high fees for them. There is always that exceptional talent who you can demand whatever you want for but they don't come around (in a Motherwell shirt) very often.
You can bet that although Fraser might seem half the player that Jamie is his contract at Aberdeen will be worth much more than Jamie's was with us, and this is reflected in the trasfer fee.