I had a look at that before, nice bass! Maybe a little overpriced, however basschat prices tend to be quite a bit cheaper than the going rate.
My Warmoth fretless has been up for sale for months and months, that's a premium wood Jazz with top quality components and a great build with a good case for £370. It'll go, just gotta wait until someone wants it!
One thing that irks me is that i initially refused a great trade for a bass which later sold for over £500. Live and learn i guess!
Also bear in mind that it's not everyone's idea of a Fender Jazz, the more typical styles are always more popular and tend to go pretty quickly