I was watching an episode of Gogglebox ( an UK channel 4 show) and someone said Avocado is posh. I didn't think of it as being eaten mostly or by only posh people before.
Here is Mexico I buy avocados for about 90 u.k. pence per kilo. But my friend in Holland pays 5 -7 euros for one avocado. Posh, maybe not but fancier the further east you go.