Thats his trick it seems.
He did not sell me a tool, 1 week ago he msged me if i found a working cdm for amazon and bla bla and that he is looking for cdm as well.
So i thought the guy is searching too.
Today he msged me:
hey buddy, got L1 cdm, from one of the uploader, only that cdm private is available with 3 members, would like to sell per 1 person, who dont resell it, the price is 500euros.
Sent with ProtonMail Secure Email.
He provided decryption keys etc.
Sent even a rar file but password protected and then no response anymore.
Widevine L1 and L2 cdm scripts don't exist yet as the security for them hasn't been cracked. There may be L3 scripts since L3 cdm was cracked
https://bitmovin.com/google-widevine-l3-cracked-expect/, but generally you don't want these because a decrypted L3 stream has much lower video (<720p) quality compared to L2 and L1.
If you still want to look for an L3 script then bear in mind that browsers like chrome and firefox only support L3 cdm so any script would have to run in the browser using Javascript. If someone tries to sell you something that doesn't use a browser then that's a red flag.