I'm really tempted to buy this Dot, but I was wondering how serious these cracks in the neck are. i.e. whether they're just the finish or something more serious.

Is this worth buying?

that looks as if it has been dropped on its headstock
i wouldnt buy it
the headstock is going to break off
Those appear pretty severe. Unless you can get it VERY inexpensively, pass...
It's not just the finish, the crack appears to be running from side to side, it's going to be bad.
I don't have a signature
it surely was dropped and it surely affeted the wood, but I don't think the wood has been seriously damaged... I believe it might be just the finish. either way, you have to consider the price. It has to have big big discount. Also, do you know how long has the crack been there?
hands down.