This can not be overstated.
Before I moved last year I went to a "post office" counter that was in a grocery store. The clerks were employees of the store, not the post office so they had no incentive to upsell. One time I brought a box and they suggested throwing it in a bag, which saved me 2 or 3 bucks.
I recently went in to a post office here and the clerk felt the envelopes and asked if it could bend. I made the mistake of answering "I hope not". She charged my a couple bucks for each envelope that should have been 70 cents.
Finestkind wrote:
It also depends on what kind of attitude the postal clerk has. Some are very helpful. And some not so much. I go to the post office in the next city over from me for that reason.
A man has to have goals — for a day, for a lifetime — and that was mine, to have people say, "There goes Ted Williams, the greatest hitter who ever lived."