Im not over 18, and i have my bike full paid for, i work hard for the parts and bits to fix it, no way can anything be done about under 18 buying and selling! I think the idea of a reciept style pm on the forum is a good idea! This way there is obvious proof of the transaction! I think its a good idea, but it wont stop or scare many scammers in my eyes! Good idea though, could work very well! Owen