Okay, I'll bite
I was a sales manager at Best Buy for quite a few years, back in the day. Sort of a fun job, but there were always the "interesting" customers/stories we had to deal with. Here's some of my favorites:
1.) REBATE GUY. Every Sunday morning, without fail, "rebate guy" would be waiting outside the doors at least 30 minutes before the store opened. He was a goofy looking guy - always wore the same leather jacket (summer/winter, didn't matter) and had the most unkempt looking mass of curly hair... half of which was grey, about a quarter was black, the other quarter brown. He was a tall, lanky fellow, with a look about him that made you wonder if he was either really smart, or a complete moron. In any case, this guy would invariably come over to the computer department, and would ask us about EVERY product that had rebates on it. "How much is the rebate for?" "How long is it good?" "Where can I find it?" This went on, and on, and on. The kicker? Never - not once, did he buy anything. That's right, this guy came in for at least 2 years straight, every week, asking about every rebate... yet he never bought a thing.
2.) "The computer expert" Often times, people would bring thier family "computer expert" to help them select the right machine. Of course, 90% of the time, this so called expert wouldn't know the difference between a PCI card and a roll of toilet paper. They would argue with us, spout out completely useless jargon, and end up convincing the customer that yes, that $399 Packard Bell computer was a GREAT deal!!! With friends like that...
3.) The Thugs. On day, I had these three guys come into our store. Not to sound mean or anything, but you could tell by looking at them that they weren't exactly CEO material. They were HUGE too... not one under 275, and I'm not talking about fat, these guys were beasts. They come strolling right up to the computer department, look at me, point at the most expensive computer we had at the time ($2000 just for the computer) and said, "We want 3 of these". I can't exactly tell them no, so I load them up on a cart, and direct them to the checkout. The main guy just gives me a devious grin, and they just walk right out of the store. That's right, just walk out. Right by the cashiers, right by security, and just cruise out to thier car. They load the machines up in an old beater Olds, (with no plates) and casually drive off. Not much we could do... I'm still "impressed" to this day at the guts required for that, and the completely calm way in which they blatently stole. These guys didn't even run, didn't try to hide thier faces... nothing. Worst part is? We never caught them!