I would opine that $1K is not unreasonable. If you are patient, you should be able to grab one in the $700-$900 range in under six months. Older ones are every bit as reliable as more recent units. Alembic’s design and execution are solid. If there is a problem, Alembic and/or forum members will walk you through any repairs. Have you compared the F-1X to Alembic’s other preamp, the F-2B? If not, you might want to check it out. Each has their advantages. They sell for about the same and are similarly available.
Bill, tgo
