When it comes to Online Airsoft Scams, we find swaps are the routinely the most prolific.
One party will send their gun/gear and the scammer won't. They get a free gun and you're out of pocket.
Please be extra vigilant when doing a Swap with someone.
I'd even go as far to suggest never doing a swap unless it is in person. I recommend trying to meet at an airsoft site.
On a similar note, please be extra wary of anyone using a BT33 postcode.
This isn't to say that everyone from that area is a scammer, far from it, but it's known as the location of one prolific scammer in particular - I won't name him here, but it's easy to find out who.
Just be very careful and try not to fall for any lies or tricks.