Acquiring a domain name that claims to be under construction

I am planning to launch a new SaaS product that nicely fits a catchy word. it would make a perfect brand name, but the domain name is already taken. the site claims to be under construction for at least a few months, and offers no way of reaching that company's services.

I also suspect that they dont even have a product yet for that site, so it wont be that painful to give that domain name away.

I know everything is for sale for the right price, but how should i approach negotiating for it. and what price should i expect

godaddy offers to contact the owner and negotiate for me.;
http://www.valuate.com/ which calculates domain name prices, it approximates it to be around 30000 usd but i assume this prices to be highly flexible accordig to the owners expectation.

Your comment likely answered your question - prices (and valuations) are all over the place, and what is acceptable is based on the sellers perceived value and your ability to meet that. Basic rules apply - shorter words are preferred, .com is worth more than others, hyphenated phrases (buy-now.com vs buynow.com) are less desirable.

Some other pointers: If the owner has 100's of other domains, they likely are reselling the domain. check the owners name / company in google before contact.

If the owner has renewed the domain over many years / or just registered it, they likely are not interested in selling it.

Many times GoDaddy type services are simply trying to push services - unless the domain specifically states it is interested in selling the owner likely isn't looking to sell. Example: I did a search on godaddy for one of my domains that I have no interest in selling, and there it was, a "want to buy this domain?" offer.

How to approach: First thing would be to find the administrative contact for the domain.
Go to a whois site like whois.sc (or whatever you desire) and enter in the domain in question. check the administrative contact email - some times it will be a real email address, other times a privacy connect. Try sending an email to that address expressing interest. Sometimes that works, other times the email gets lost in the spam filters.

Second would be to find the address of the owner. Do some sleuthing around via the net to see if you can find a phone number associated with the address. Again, if privacy filters are in place, you may not have a path here.

Third would be to check the current webpage (if its not a coming soon page) and see if there are some indicators on where the owner is located.

Bar that, you can only go through the "negotiation" path that services like godaddy provides.