Where do I begin? I ran a computer supply/repair business I had quite a few OAP's as clients due to word of mouth.
I had one geezer who wanted a top of the range PC and after looking around he bought one of the i7 systems from here (about a year ago) and a £700 monitor and lots of other bits and pieces (probably £3.5k all in) but when I explained to him he should really get broadband as he was only going to use it for internet and Word he said he couldn't afford it! I did tell him a £500 Dell would do but no!!!
I then get a phonecall from his missus complaining that the internet was no faster and that I'd promised it would be really quick as they had spent so much!!
FAIL
I had another guy buy a second hand system off me - I used to always get people down to my workshop to see second hand kit working before buying (that way no excuses). Anyway, guy paid up (£200) and off he goes. System had a brand new GFX card in, some ATi PCIe I got for £50, nothing special.
Anyway, later that day I get this total nutty woman screaming down the phone at me saying I'd basically stolen £500 and that the PC wasn't working, blah blah blah. Anyway, I calm her down and say that if it wasn't working I'd refund £200 if it hadn't been tampered with...... woman turned out to be guys mother (guy was 27!!)
Long story short, the guy had bought this off me, sold it to his brother for £500 and tried to swap over an AGP gfx card and didn't seat it properly (figures as mobo was PCIe!) and turned the thing on, blowing the mobo. I ended up looking at the PC and gave this guys mother a call back explaining what her other darling son had tried to do.
EPIC FAIL
Sorry for long post but some people should not be allowed to own a PC