what's a pronounceable 4 letter domain worth?

[Matthew Doucette]

Apologies if this should be posted elsewhere, but I figured it's a good place to start. My question concerns http://xona.com/, which we were offered $10,000 USD years ago, due to its strong ties to Arizona being its nickname. It has more direct value being the next proposed extension to the SI units (kilo-, mega-, giga-, ...). Years ago I figured it to be worth at least $20,000 USD to us, which is why we rejected the offer. $20k would have been us breaking even, so the price would have had to exceed that. This does not mean it's actual worth is that high. If this post is out of place, then please direct me to how to properly discuss this. If this discussion is out of place, then apologies...

P.S. I'm actually not new to the domain business, I coined "domain hack" when I created my first domain hack search, now likely outdated: http://xona.com/domainhack/

Thank you.