I'd only buy one consigned to a dealer, full paperwork, DROS, etc. I'm not interested in a piece that could have been used in a murder, robbery, etc. If done via dealer with DROS documentation, at the very least I know that 3rd party govt mandated proof exists that the gun was not mine nor in my possession when the altercation took place. That is peace of mind that I need. Private docs/bill of sale scribbled on the back of a Burger King napkin don't sound sufficient to me.