I would never buy something like this through an unofficial vendor when it's available from the official vendor.
The price difference ($4.50 vs free, lol) is, for me, actually just a secondary annoyance.
My primary concern is that SIM card readers are widely available for less than $10 and blank SIM cards "for backups" are widely available for less than $5 each, less than $1 each if purchased bulk. (Not to mention that data from vast numbers of SIM cards could be stored on a single computer drive.)
I would never know if an aftermarket SIM card has been copied or altered. But I don't want anybody stealing, hijacking, or billing my phone service. And I don't want anybody installing any sort of loggers or backdoors or malwares or junkwares or bloat on my phone. I honestly don't even know *exactly* what's stored on a SIM (never looked, lol), I'm not even certain if they could be meaningfully hacked - but I do know that clean hardware and clean software will always be more reliable and trustworthy than compromised wares from dubious sources. And, to me, any aftermarket owners/vendors/resellers I don't have to deal with are dubious sources. This guy might be legit, but savvy people will avoid the compromise.
