A lady where my wife works asked my wife if I could find her a specific machine for her husband. She wanted me to find her husband's favorite game of all time...TAF...and she was willing to go as high as $500. Seriously. I did get a chuckle out of that for a few minutes. Luckily it was in an email otherwise I think I would have been slapped.
I had to explain to her that they go for WAY more than that. I told her to expect to pay about $3,000 (granted this was about 5 years ago). I was able to find her one for $2800 in pretty nice shape. I bought it, she paid me and gave it to her husband.
That was the only time this has happened.