Hi, I notice that all the cars you are looking at are on autotrader, 90% of the adds are traders so the cost is more (I don't trust and would not buy from one), why don't you look at private sales-
http://www.ebay.co.uk/itm/Jaguar-S-Type-4-2-V8-FSH-Top-Spec-/112105587423?hash=item1a1a0382df:g:7NAAAOSw9NdXvdZG
http://www.ebay.co.uk/itm/2003-JAGUAR-S-TYPE-4-2-V8-SE-FULLY-LOADED-WITH-SAT-NAV-/322235464947?hash=item4b06bafcf3:g:vgoAAOSwIgNXqfjg
http://www.ebay.co.uk/itm/2001-JAGUAR-S-TYPE-V8-AUTO-BLACK-/112107337856?hash=item1a1a1e3880:g:IjQAAOSw65FXvWLB