I have no connection with the seller
https://www.basschat.co.uk/topic/347587-alembic-f1-x-rack-valve-preamp-with-di-and-crossover/?tab=comments#comment-3835280 (https://www.basschat.co.uk/topic/347587-alembic-f1-x-rack-valve-preamp-with-di-and-crossover/?tab=comments#comment-3835280)
Can't recall the earlier selling price but it's now £350.