Hello everybody Lemon here! I am gonna tell you some ways to avoid being phished, sharked, and scammed.
First tip -- Always check their backpack before buying anything they offer! A way to do this without being phished by asking for their bp.tf link is to ask for it to be pasted in the trade. After that you look at those numbers and copy that. Then, go to backpack.tf and look at the bp.tf search bar, paste the ID in there and click the profile that comes up and you can check everything!
Second tip -- Want to check the history of an item on outpost to make sure it's not duped? I got your back (Ba dum tss) just click the item and look at the original ID not the ID but the original one, copy that. Then, search in the top search bar this, backpack.tf/item/ID (Paste the ID where I said ID).
Third tip -- Do not trust people too much, if they offer you paypal/steam code money ask them to go first and never go first because they are attempting to scam you! If you recieve the money then you can trade the items!
Have fun everyone! Be safe!