On another level, I recently bought a Cherimoya [1] for $5. Extremely sweet, but very sensitive and difficult to transport. It was worth it, but too expensive to buy one everyday.
It looks like atemoya is an hybrid https://en.wikipedia.org/wiki/Atemoya It looks very similar, but it's difficult to guess how different is the taste.
[1] https://en.wikipedia.org/wiki/Cherimoya