A buying and selling online can be very convenient and rewarding but you always have to protect yourself.
If a deal looks too good to be true, it usually is, If you don't feel secure on a particular site,
leave it and find something else.
I think that in SCE, they would be screening all the things posted or will be sold in the site. That's one of the main problems in online shopping because the credibility of the seller and then product itself is something questionable. Hoping that in SCE they will be able to address to it.