I noticed this year my small, boujee grocer had peaches in July (middle of winter). I bought one without checking the price. They were AU$38/kg imported from the US. So they do exist counter-seasonally. From my sample size of 1 I can say that what others have said about them not travelling particularly well is right. Not poor quality at all, but similar to what I would expect in season from a supermarket. Certainly not worth the price.