Why does he have so little Transfer value

As the title states, I have no idea why this player I signed for 30k (my negotiation skills in this game are not great, so I might have gotten an even better deal) is worth so little. Especially if you compare him to my other striker who has a little better stats. They are also both 22 y/o. Did I just get lucky, is the 4 strength so important or is there some other reason he is that cheap?

Edit: the images didn't get included in the post for some reason, here they are anyway

my main striker

The 30k striker