"I can get it for less some place else."
I wish for you to believe that I have connections and am a powerful negotiator but I am unable to understand that if I can, indeed, get it cheaper somewhere else; I should go and get it there. Further, I am unable to comprehend that people easily see through my self-seemingly clever ruse and respond with elaborate hineyhurt when I am told to, in fact, "go some place else."
"I have also failed to take into account tax,shipping handling or any transfer fees as well as any extras such as optics, mounts, mags, ammo, cases or holsters etc."