haggling/negotiating prices

[lucas9000]

obviously there are some markets where haggling/negotiating the price are standard, eg, cars, drugs, whores. also there are some contexts where it's just not done, eg, fast food, groceries, etc.

i'm curious as to what people have haggled for that might be a little out of the ordinary (in the sense that maybe people don't usually haggle the price for it, or most people wouldn't think to do so). i have a feeling i've missed out on some opportunities.