No I don't think it's too expensive, It is expensive thats all, but then we seem to pay a premium in Europe for used alembics due in part, I think, to the rarity value.
The Alembic Tree Of Life inlay on that bass alone is $6000 in the quote generator so thats about ?4000, all the hardware looks gold plated too so thats worth a bit.
Are you considering buying then Jacques?
Jazzyvee