Have a bottom line and know what it is. Your 'potential buyers' have a bottom line.
Like DOD said, ask for offers. Not being first to show your hand is a good rule, but in domain name negotiations, I have found that there are often exceptions to this rule. Especially when dealing with domain name newbies.
Back to the original point; Have a bottom line and know what it is. Know inside what you would take. Then wait [ and hope ] for a response/s that is close to, equal to, or over your bottom line.
Also, don't go buying that new car until the deal is done. DotComster was prolly right about $1,000 minimum, but you never can tell. I seem to remember IndustrialResources.something? selling on AN several months ago for ummmmm, $45K?
notes from a quack