I usually do a bill of sale when I sell a gun to someone I don't know, which isn't very often, but it doesn't get into logging personal info when not needed. Just a signed statement that they can legally own it and they are a resident of my state. They get the same info from me on their copy of the BOS. If I sell something that's listed in my C&R bound book, I have to get the required disposition info, but I let the buyer know that up front. If they don't want to sign a BOS, or give me info for the bound book (when applicable), they don't have to buy it. There are probably 30 others that will have no problem signing a bill of sale or give info for my bound book. I bet that most of you protesting saying you'd walk away would be quick to sign if the deal is good.