My best one was :

Me: 25k
Him: 15K alright?
Me: 25 firm
Him: fine, 25 right?
Me: yeah..
Him: You promise?
Me: yeah...................
Him: puts up 25 gold
Me: NOT EVEN FUUUUUUUUUUUUUUUUU
Him: BUT U PROMISED SCAMMER SCAMMER
Me: proceeds to cuss him out.