For me I can handle a fluctuation of maybe a couple £100 or so. Things change pound goes down something somewhere causes something else to get more expensive etc, etc. But when prices are changing by the thousands over a three month period it does seem to be outside the normal realm of economics.
Current Car
KIA Sportage GT Line Mhev
Previous Cars
Peugeot 5008 Allure Premium
VW Touran SEL
Citreon C4 Picasso