Sales at a gun show in OR require a backround check. A gun show is when more than 25 guns are available for transfer at the venue. These statutes are relevant. Transfer of Firearms at Gun Shows http://www.oregonlaws.org/ors/166.438 A gun show with more than 25 guns available for transfer in ORS 166.432. http://www.oregonlaws.org/ors/166.432
Yes, I am very well aware of what Oregon law says on the matter. However, that does not change the fact that at a gun show earlier this year I personally witnessed a guy selling his own guns by walking around with a sign and the guns he had for sale on his person. He did not require a background and I didn't see anyone having a problem with what he was doing. I was going to buy the rifle he had, but he was asking too much. I'm not saying that I agree with violating Oregon law in this situation, however it didn't really stop him now did it? So, back to my original point; I think he was referring to this particular situation.