I passed one up at a gun show a few years back and have been kicking myself ever since. It was marked $350 and odds are I could have talked the guy down a little. Stupid, stupid, stupid.
I passed on the chance to buy two Colt 4" Pythons for $950.00 once - yes - it was $950.00 for both, not each...that was about 12/13 years ago...
Now you can peacfully sleep knowing you're not the stupidest person on the planet