A bill of sale is worth the paper its printed on.
Anyone who sells you a stolen gun probably doesn't mind signing a BOS with a fake name and fake ID.
The idea that a bill of sale somehow immunizes you from receiving stolen property is laughable.
Need a FFL in north Dallas/Plano/Allen/Frisco/McKinney ? Just EMAIL me.
$20 transfers ($10 for CHL, active military,police,fire or schoolteachers)