That is a very nice bass. However, caveat emptor.
If you look at the pictures in an enlarged state, the neck pick-up has all 4 mounting screws on top and the pick-up housing is cracked. The seller states that the bass has been maintained by the luthier to the stars - John Carruthers. Well, clearly the luthier to the stars is not familiar with the Alembic pick-up mounting system.
Also, take a look at the machine heads - I may be wrong, but they appear to be Grovers, which leads me to believe they're replacements.