A few people have been scammed on the site, Only use paypal to pay for items for sale by other members. If they will not use paypal, its likely a scam NEVER SEND E-TRANSFERS OF ANY KIND.
I used to help run (as a full time job) two of the largest RC forums in the world. Flyinggints.com and rcgroups.com, and started and sold giantscalenews.com... so I;d be happy to help if I could.