Last week (June 29) I managed to do something I've been trying to do for years and lost hope of as being possible in the US. Purchasing fresh guanabana!
I finally found a credible and rather easy to follow internet post to a report of fresh guanabana at the Davie Foodtown at this time of year. I called up on a Friday, and sure enough the produce manager said he was going to get in some fresh ones on Saturday, but they wouldn't last long.
Apparently there is a local grower with limited supply in Davie, and there a couple of markets that have them for a short period. These guanabana are smaller than what I've seen in Jamaica (where they are called soursop.)
The flavor is very good, unlike anything else, but they are difficult to eat. The fruit is like a banana-pineapple custard that clings to its seeds. The trick here is that these seeds have a slightly bitter aftertaste, so you have to get the fruit off without tasting the seeds.
The guanabana are very expensive at $5 a pound. You need to wait until they are very, very soft which could take a few days.
This is a rare Chowhound experience that provides a huge payoff for the intrepid. Not as good as the guanabana I had in Jamaica, but a very special treat all the same.