Selling a gun can be a terrifying experience, you should just give it to me.
Ok honestly I'm no expert but I did stay at a Holiday Inn Express last night.
Where to meet: I've done deals in the parking lot of Walmart, Kmart, McDonald's, and a movie theater.
A Bill of Sale is not required by law and if you require one you will likely limit the number of people willing to buy. You do reserve the right to check for Colorado ID.
The people here are a good group and will rat out someone who is shady pretty quick.
Bringing someone with you is totally up to you and your comfort level, if you are the Dawn I'm thinking of from BC I know you have no problems taking care of yourself should the need arrise.
I will say even though I've done several transactions with people here and all went down smoothly it still feels shady swapping guns and cash in a parking lot, even though there is nothing illegal about it.