Actually, to be honest, one of the coolest customer service experiences I had was years ago with taylor cutlery when I didn't know anything about knives and thought smith and wesson knives were the best thing ever.
I talked to this one guy on the phone, and after a while, they let me send back a USED folder (that I had bought but then decided I didn't like) and swap it out for a brand new different folder of the same price.
Then I went and thanked them and sent them a nice email, and they sent me a hat!
Now granted, I was basically trading crap for more crap, but it was still cool of them to pay shipping and everything
on the other hand, I wanted to swap out a brand new benchmade minigrip combo edge for a plain edge, and they charged me 25 bucks for it, plus I paid for shipping both ways. The original lady I talked to on the phone said I could get exempted from that charge if it was found to be completely unused blade, otherwise I wouldn't have done it and just bought a new one. After they got it, I talked to a different person, and they made me shell out the 25 bucks.
Also, Emerson was pretty cool about it. I got a used CQC 8 from ebay, that I discovered had a stripped screw for the clip. I called them and they sent me a new one, free of charge, no questions asked. I got a few days later