Theres a lot of guys on TI trying to deal in pm so we don't catch them using proxies and being shady, if anyone PM'S you offering anything and they have a very low activity on TI with little or no posts or feedbacks then be very cautious.

These people are mostly idiots that aren't very smart so you should be ok once you keep your wits about you, guys who choose to act this way usually have something to hide and their intentions are not good, this does not mean that all users with low activity are bad of course.
If you get a pm like this just search the members recent posts and started threads, if they have not made a sell or trade thread then this is a good indication to take cautious , also watch out for members offering invites/accounts at really low prices, this could mean the accounts are hacked or they don't even have them.
If your in doubt pm a TI staff member to check them out, if any members want to buy an invite or account then I highly recommend buying from one of our top trusted sellers as your gauranteed a refund if your account gets disabled for reasons that were not your fault, our top sellers have a lot more to loose if they mess members about and don't look after them.

If I missed something or you have any questions please feel free to post in this thread.