The Dangers of Buying Steam Accounts
If you’ve bought a low-digit account before, even if it was 5+ years ago, all it takes one quick report, and all of your Steam accounts could be gone, forever, regardless of how much time or money you’ve spent on them.
All it takes is 2 minutes of someone’s time to send in a Steam Support ticket with the claim that you’re an account hijacker and stole the account, and there’s a high probability Valve’s newly-evolved anti-fraud & theft team will look into the reported account, particularly the IP address history on the account. If anything seems off, such as if the account, after years of inactivity, suddenly becomes active again on an IP address located across the world of the creation IP address, Valve will ban the account and all accounts associated it via phone number, which many users share across multiple alts for SteamGuard Protection. In addition, if you already have a previous record of owning stolen accounts or attempt to fight Valve for the account back with unconvincing ‘proof of ownership’, Valve’s new anti-theft & fraud team may go so far as to ban all Steam accounts associated with your IP address and then label you as a social engineer / account hijacker in their database for daily monitoring.
Valve has also been looking into the friendlists and groups of stolen accounts, so even if you stay low-key and feel confident no one will ever report you, you might have a friend added on Steam who has a bought low-digit account, and Valve could look into your accounts if your friend gets banned.
How can I keep my low-digit account safe?
You most likely can’t. At least not without an excessive amount of information about the account which very few sellers are actually able to provide. But if your goal is to be 100% safe, you shouldn’t be buying accounts in the first place.
There’s an even higher risk of buying accounts (99% of low-digit accounts being sold are stolen) than hijacking them yourself because Valve will clearly be able to tell someone else hijacked it and then sold it to you, especially if they’re from Russia where Valve knows most account hijackers are located. Valve likes to keep daily tabs on ‘known’ account sellers.
What if I still want to buy an account?
If you do buy ANY account, always prepare for the worst and unlink it from your other accounts as much as possible. Definitely don’t re-use the same phone number or e-mail address across multiple accounts if you want to avoid chain bans.
Ensure the bought account comes with full, secure access to the original e-mail (OE) address used to create the account, in addition to the Half Life Pack CD key if it is a low-digit account. Valve almost always prioritizes the CD key over OE access, and physical image proof of the CD key written on the HL box is always preferred, which is why some account hijackers fabricate proof by writing or printing the CD key on a fake HL box/paper. In some cases,
Valve may still indefinitely lock the account and/or ask for original receipt proof that you bought the HL pack because
many account hijackers buy tons of HL boxes on eBay for their CD keys to recover low-digit accounts with which is against TOS and is considered buying/selling proof of ownership.
If possible, you should also have the location the account was registered in and the date the seller hijacked it and their location so that you can come up with a plausible story of the inconsistent IP address history in the case that something happens. And then, only then, with an amalgamation of plausible information and OE access and CD key, I’d say your chances of keeping the account safe are pretty good, but most account sellers unfortunately can't provide all of that information because it’s quite difficult to get.
Epilogue
Bought Steam accounts, especially low-digit accounts, have been getting banned left and right everyday now. You can even see many account sellers today saying you
shouldn't even change the e-mail address on the account because it could automatically flag the account and lock it, and they refuse to insure you / refund you if this happens. The sellers know this, which is why they want to get rid of their high-level low-digit mains. Don't buy from such sellers because these accounts are bound to get recovered and/or banned eventually.
I could write lots and lots more about this, but I didn’t want to make it too wordy, so if you have any questions, feel free to ask.