80% Chance Of A Beatdown
Okay Theodore, you made 6/10 checks. You make 129 gp (that's 29% profit, not bad for an afternoon work).
Then you try selling to this half-orc, who looks at the stuff, looks at you, sniffs it, and says "What the hell you pullin here Short Round? What kinda sucker do you take me as?" He's not backing down, and if you excuse yourself, he starts following you at pace, yelling "Come on shorty, you think I'm a sucka? You some kinda new player? Huh? Yeah I'm talking to YOU." The weatherman predicts violence.
[Post corrected below Thaka... 1s are successes, 20s are failures.]