i guess I get to play contrarian, again.
I would repair it, or rather more accurately have it repaired, depending on if all of the wood is present. A lot of luthiers have extensive experience with repairing headstock breaks (thank you Gibson), and while this may look really bad, they are clean breaks, with a lot of side grain gluing surface that should work well for long term stability. I can see the major pieces, but the number of small bits is harder to assess from the pictures. If you have a good local luthier, you should at the very least have it assessed by him before deciding. Be sure to try and keep all of the wood pieces with the guitar when you bring it in, no matter how small or insignificant they may seem. This is NOT an impossible repair. There may be cosmetic issues, and even those could be addressed, depending on how much they bother you.
As to value, that is something only you can decide. Take the assessment from the luthier, and think about it. You are the only one who can figure out what they guitar, its memories, and overall how much it means to you vs. the cost of repair or replacement. After that, you still may end up getting another guitar to tide you over while this is undergoing repair, but that has more to do with your own situation regarding gigging and songwriting.
I would repair it, or rather more accurately have it repaired, depending on if all of the wood is present. A lot of luthiers have extensive experience with repairing headstock breaks (thank you Gibson), and while this may look really bad, they are clean breaks, with a lot of side grain gluing surface that should work well for long term stability. I can see the major pieces, but the number of small bits is harder to assess from the pictures. If you have a good local luthier, you should at the very least have it assessed by him before deciding. Be sure to try and keep all of the wood pieces with the guitar when you bring it in, no matter how small or insignificant they may seem. This is NOT an impossible repair. There may be cosmetic issues, and even those could be addressed, depending on how much they bother you.
As to value, that is something only you can decide. Take the assessment from the luthier, and think about it. You are the only one who can figure out what they guitar, its memories, and overall how much it means to you vs. the cost of repair or replacement. After that, you still may end up getting another guitar to tide you over while this is undergoing repair, but that has more to do with your own situation regarding gigging and songwriting.