Case? A case is a big extra for a Jaguar buyer.
Olly white is'nt quite as common as CAR and sunburst but still popular, it depends were your selling it to be honest. In the UK 350 GBP is a fair price for a second hand CIJ Jaguar in good condition.
But saying that, on ebay you could end up with less. My CAR model went for a pityfull 270 GBP, bad timing, poor pictures.. i was desperate at the time. And i recently bought a burgundy mist model for a similar ammont.
So, private sale is your best bet or even a shop trade. If you do go on ebay look what else is on. If there is an olly white model going cheap give it a few weeks before you list.