Is it one of a kind? Sounds a little fishy to me, I'd buy elsewhere Not worth risking your money or creating legal problem for you yourself. I don't know about AZ laws or laws where you live, but you're not talking a Face to Face transaction. "Worried about rules" should be a red flag!
Agreed. You don't have to worry about the rules if you obey them. Transfers through an FFL are simple, legal, and they leave a paper trail. They're also more expensive but that's life.
I think this seller wants wants a face-to-face deal in AZ to avoid paying shipping, transfer fees, and sales tax. That makes a certain amount of sense. Where I live, shipping is about $30, transfers are about $50 on each end (shipper/receiver), and sales tax is about $50, so a $500 firearm ends up costing $680. Either the buyer pays more, the seller gets less, or they split the costs.
I'd walk away.
Okie John