I don't think any of the mods that require a bos. Maybe MDog. I have traded several times with an attorney who is a member here and who I respect and consider a friend. He does require a bos. Go figure.Sorry but I lol'd hard at that. I'm not trying to uncan the worms, but here is another stance. I have PERSONALLY met and traded with Okuma Steve. For those that don't know, he oversees this site and all legal issues. If a bill of sale was something that would legally benfit someone that runs a firearms classifieds website, that's had records subpoena'd and such, Okuma Steve himself would have asked for one. At the same time, the Mods Like Soviet (Who will one day come to follow the footsteps of the Glock fan club) and NWSharpshooter do not require them. Says alot since they are appointed a position of some power in a site which could take heat over firearm related issues. At the same time, I've never heard an attorney that reccomended a bill of sale or listed the benefits. I'm sure myself, Okuma Steve, NWS, and soviet all ask for the same thing.. A good itrader and a handshake, maybe a glance at the ole drivers license and ask "are you legal to own a firearm yada yada", but nothing more.