How to estimate the true price of a premium domain under auction?

OK, I am in an auction for a 6-letter .com domain. This word is a common word but doesn't have much commercial value. I try to compare this "word" and very common words like "dog", "men", "news", and this particular "word" is much lower in search volume (ie: 1/20th search volume as "news" and 1/5th search volume as "dog". It is, however, comparable to the search volume of the less (but still very) common words like "health".

This 6-letter "word" has 22200 global month searches, CPC = 0.41, and low competition. Other domain names as variation of this "word" for example, "4-letter word""6-letter word".com's are selling between 1000-3000 set price, but I always get an intuition that they might be inflated by sellers.

I don't have a set plan of what the site will be given that domain, but this word is very related to my interest (related to my grad study research in a general sense) and I am thinking in long term I can build an ambitious site off this domain.

I was just messing around on the auction, I have placed some offer as $2000, and the seller actually counter-offered at a lower price at ~$1500. To me up to $1500 is affordable (though it's still a lot of money, but the "word" has the potential to pair with other lucrative areas, so maybe in a long run it will pay-off), but is there any way or tool to help estimate the value of a domain name?