I came across this 7 inch single of Olivia on Ebay which I have never heard of before does anyone have any information on its release date and how much should I pay for it?? it says Rare '88 Australian only ltd 7" b/w Instrumental

here is the link

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=320495028162&ssPageName=STRK:MESELX:IT