I sell everything on Buy It Now, with the best offer thing switched off. Occasionally people will write to me with offers anyway, which I still think is CF although I know Ebay tend to encourage it a bit. Usually they're not even in full sentences, or written in a non-polite manner, so I tend to ignore them. I've only ever given one person a small discount, and she didn't even leave feedback to say thanks. So now, if someone writes to me, I'll always check their feedback left for others. If you have a feedback score of 500 but you've only left 20 for others, then the answer's no.
I have now received a message from someone asking if I'll accept offers, but they didn't actually suggest a price. I'm in two minds about it.
How do people feel about receiving these offers when they've switched it off? I would never go into a shop and ask for a discount, but apparently a lot of people would.