I suppose it keeps third parties from making a police report that it was stolen from their storage shed some time in the last 2 months, not sure when. It has a little ding on the top plate, and yada yada yada. You probably would get to the bottom of it sooner or later but it would be a major headache for the buyer and seller if a third party made such a claim. A rough description with a matching serious number they would take as a serious claim.
Edited to add: ACK I knew that wasn't an original avatar idea. Maybe I need to change back to the rangefinder RF plate, it's kinda freaky seeing the two side by side.