These were around £650 when they came out in 2005. I bought a tobacco burst one brand new back in 2006 I think. They were all Quilted maple apart from a black one.
I owned it for a few years. sounded great, nice and light too. Cant remember the neck profile but it wasnt super skinny if i remember. I thought the electronics sounded great. A really nice bass.. i think £400 is a bit steep mind.
a Talkbass link with more info. https://www.talkbass.com/threads/2-octaves-1-bass-the-fender-jazz-bass-24-thread.1242462/