-snip-
I wish to mention more information such as countries, the number of times of use, warranty number and other things.
Also, added escrow service will increase the credibility.[1][2]
Can you guarantee they work with Google, FB, Insta, eBay, etc..?
S/he mentioned that it's physical Sims so It must work with those sites. [I do not recommend to use it with account " only for activation service such as Whatsapp" where passwords can be restored to those accounts using those numbers.]
you can contact him using Gmail account "jgeace245"[Source] or Look for other sellers here Digital goods.[3]
[1]
Bitify as example[2]
Recommended Bitcointalk Escrow Services - Trade Safely![3]
https://bitcointalk.org/index.php?board=93.0[Source]
https://bitcointalk.org/index.php?topic=4785813.msg43192531#msg43192531