Thanks for the notification by PM, mjs. I had missed this thread. I'm going to have a look at the .pro market and re-analyze the existing data.
The problem with the .pro extension as well as many other extensions is that the market is immature and there is very little sales data to base appraisals on. EstiBot uses two databases, the NameBio database and my own database of past domain sales to compare the domain characteristics to those of previously sold domains, and makes its calculations based on that. When there is little data it means that it the power of the statistical analysis is poor.
That's statistics for ya. I have opted to accept only those parameters into the equation that produce statistical significance for domain value. The less sales data, the less parameters to consider. Therefore more fluctuation with valuations.
This requirement results in certain limitations and general unhappiness amongst owners of less popular extensions. I could go the Leapfish route and consider in the valuation whatever I THINK has an effect. That would make the system more universal, but also very unreliable.
My system is far from perfect and has its shortcomings, but although the requirements I have set do cause some limitations and inaccuracies, those requirements are also the sole reason EstiBot is (arguably of course) much better than the other free appraisal systems out there, and better than many paid ones, too.
akcampbell said:
Goodness of fit is a critical value adder for alternative extensions and is something bot valuation tools are hopeless at picking up on.
Not so fast

I'm working on a goodness-of-fit routine for extensions (which are, like .pro domains, essentially, domain hacks), it was my intention from the start. I've had such major problems recently with the functionality due to heavy use (and unfortunately some excessive use) that it's been quite a battle to just keep the site live...therefore this domain-hack detection routine has been low on my priority list, but I'll get it done. I have it figured out already, just need time to do some coding.
sky said:
It's OK. I didn't pin all my hopes on EstiBot. The frequency counts and *relative* valuations of .pro names was very helpful for me to establish which among two or more .pro would *tend* to be more popular.
Thanks for using my tool exactly as it was intended to be used: Ballpark/relative value combined with the provided keyword data combined with owner's knowledge of the market + human intuition.
It is of course just a program, and provides one-way information. To be fair to my bot, it only has one go and must provide a number within seconds to thousands of people every day.
The results always require human interpretation.
Depending on whether you like to use my program or hate it, you may or may not be interested to know that for those domains that are found in the previous sales databases, EstiBot provides an appraisal that is a combination of its own raw appraisal and the known previous sale price. That's why you may see values that are sometimes higher, sometimes lower than the actual sale price.
Ok better stop here before I get carried away again...sorry.
Anyway, as noted here it's just a bot, I'm working hard to make it as useful as possible, and I promise to take a look at the .pro valuations.
Cheers!
Josh