I'd say take charts... the next owner should get updated charts and heck they should follow their dream not yours.
As for anything else on the boat.... take anything that is personal... but leave that stuff that was made or fits the boat, and anything that is installed...
Don't strip the boat, but stuff like bedding and rugs that only fit that boat, you may as well leave.
Having just acquired a boat, new to me, I found it reassuring to find documents on the boat's history and all the manuals, but anything else that did not have an immediate use, went right into the trash.