I’ll leave it to you, because availability of the good stuff really varies by location.
Here are some helpful articles:
http://www.guardian.co.uk/lifeandstyle/2012/jan/04/olive-oil-real-thing
http://ideas.time.com/2013/05/17/forget-the-irs-theres-an-olive-oil-scandal-afoot/?iid=tsmodule
Rule 1: you get what you pay for ! There is no such thing as “a killer deal” on “fresh healthy pure tasty” olive oil. The good stuff costs a LOT more to produce than Wesson!
Thanks! :)