[uptown]

Here's a couple tips:

1. Don't worry about insulting the person with your price, but I'd let them make an offer before giving them an estimate of your price.

2. Try to figure out what it'll be used for. This will give you an idea of how valuable it is for them, and what kind of economics are behind their business.

3. Be careful with requesting a specific price if you're not willing to go through with it, as courts have found these to be binding.

4. Use an escrow service if you come to an agreement. I've used Escrow.com, and they have a system to manage the entire exchange of domain names. The buyer pays the fees.

[d2]

Good tips. Ask for more than you think you'll get. Throw out a price before the buyer does that is high as it will create the perception of value. [Google "Price Anchoring"]. If they throw out a price first, flinch. [It sounds silly, but it works. Read The Art of Power Negotiating for more tips]

[pkamb]

"Flinch" as in physically flinch? I assume this is being done over email :)

[staunch]

You could try this emoticon: (ﾟдﾟ)