Here is a June plum I bought at a local nursery just a few days ago.
Dont know much about them other than the way they are right now they taste like a green mango.
Crunchy and a bit tart sort of "turpentiney" (if that makes sense).
No bitter after taste .....I really like them.
I was surprised to see almost every plant they had there had fruit in this small pot size and decided to buy one.
These are seedling and the guy knew nothing of variety but I was super happy with the purchase.
To me it is like a green mango that I can take off the tree and eat like an apple.
From reading these is a big difference in taste in the ripe ones so I will let a few hang to see what those taste like.
I hear they grow well and give lots of fruit....if you like how green mango tastes i dont think you could go wrong.
I spent $25 on the one pictured
Best of luck