NDS4216 495nm question

This is a 495nm diode .it is rated 200mw but i think it can reach 300-400 mw
Now, i want to ask about their price, it's a nicha diode .Anyone who has built or bought them, please give me information about them
Here is dadasheet for them:

Thank!!!

Attached Files

NDS4216-E.pdf (157.0 KB)