You know a domain is worthless if...

You can't get an NP member to bid $1 at auction when the renewal is a year away!

...you invent word strings to make the domain an acronym. ("gzbrs = General Zebra Breeding Rural Stations")

...you have to state "Frank Shilling owns the .com version"

...you need to check the spelling and determine, "Common typo. It should get plenty of bleed off the original."

....the words "Chinese" or "premium" is anywhere in your listing.

when you put estibot's appraisal in the title of your auction.

If the domain looks better and better, the more beer you drink.

When you list many potential uses of domain

.. when you have to claim
"but its really good "

.. when you ask other domainers for an appraisal

..."the .com version is listed for $55K on NameJet"

.. you only paid $1 USD ...

when you offer the name for free and no one claims it

... when it has no ultraviolet protection factor and after inspection before considering to renew it, it looks like a cheap faded chinese plastic toy chewed up by your dog ...

When you have to say it is BrandBucket approved/listed lol!

If it's posted in the "reg of the day" thread lol ... OK that's a bit harsh.

when you already forgot what it was ?

... when seller claims the domain had a pagerank of 9 before Big G made the merics a secret,

when they say the name has 100k hits per month but was only registered a few hours ago,

When you are 90 years old and still waiting for price gains on your 1996 registered domains!