I was walking by the laptops and this lady was looking at 2 17" ones, one being $899, the other being $1249. They both used the same shell, but had very different stuffs inside.
Her: Are these two different? *pointing to the two*
Me: Yeah, they have different stuff inside, *starts rattling off differences and finish*
Her: But they look exactly the same.
Me: Yeah, but it's the stuff inside that's different, not the shell.
Her: So why do they cost so much different?
Me: Because they have different components inside. *and I walk away, as I was helping another customer and knew that convo would be circular*
Another customer I had that was pretty cool went along these lines. And remember this is an older grandmotherly lady.
Her: Do you have any Wii's?
Me: No, we have none, and have no idea when we're getting any more.
Her: Oh, thanks.
Me: You can check online, they occasionally restock there.
Her: Thanks, but that doesn't help me, my husband decided today, the day before our grandsons birthday to get him a Wii, and they're impossible to find. We have one but we're not going to give him a used one.
Me: Well good luck.
Had another ornery couple the day earlier. I'd just gotten back from lunch, and I could see my manager looking for one of my coworkers so she told me how these people were terrible and swearing up and down that we had a product we'd never had, and they never made. So I go over and try to help.
Me: Howdy, I was told you had a few questions?
Him: Yeah, what's the difference between these 2 tv's?
Me: Well, ones 720p, ones 1080p.
Him: What does that shit mean?
Me: One shows more lines of resolution than the other, but you won't be getting the 1080p for a while unless you're using hd-dvd, blu-ray, xbox360, or a PS3.
Him: What the

are those?
Me *trying to keep calm*: 2 are video game systems, the others are successors to dvd's.
Him: We don't have kids, we won't be using that. We were looking for for 2 different 42 inch sony's the other week and we can't find them, where are they?
Me: Well, we had 2 different 42 inch vizios a while back, were you looking at those?
Him: No, we don't look at anything besides sony or samsung, all else is crap.
Me: Could it have been the 2 sony 40 inches down there? Those are the only 2 I remember having lately.
Him: No, it was 42 inches, I know what the hell I'm talking about.
Me: Ok, could you describe the 2 tv's then from what you remember?
Him: Well, they were side by side, they were different prices, one had that 1080p shit that you were talking about and one was in the $1400's.
Me: Alright *I walk down to where we have the 40 inchers and point to the one that is 1080p and is $1449.* These are the ones that match your description, these have to be the ones you're talking about, I've never seen a 42 inch sony here and don't even think they make one.
Him: Hrm, I guess you're right.
They eventually buy the lesser 40 inch sony from me and he shakes my hand at the end.