Meet at a Walmart parking lot with an armed friend staying in the car.
This bit of advice takes the Grand Prize for the dumbest, crappiest advice given on this blog. So, the friend will be the one arrested, face criminal charges and legal expenses for being dumb enough to be your armed guard at this sales transaction.
So don’t take a gun to a gun transaction? That’s even dumber. I always carry now I can carry open, and usually have someone in their own car too. You’re kind of screwed if they show up with someone and you didn’t. If they want to leave when they see two people fine.