I assume it's the property on Brimstone in Ardmore Woods?
From its listing, and from the one down the block on Brimstone, that other one looks a lot nicer--inside and out--than the one you're interested in. True, there aren't other great comps, either, but just looking at other recent sales in the same area--and the withdrawn properties, the listing agent was, let's say, optimistic in what he was expecting.
A property--4 bed/2.5 baths, slightly older--on Streamwood sold back in June for $612,000. A 4/3.5 on Highridge is under contract; the list price was $574,900. A 4/2.5 on Hearthstone was withdrawn after being on the market for 151 days; it was listed at $639,000. So these numbers suggest that $777,000 might not be the right figure, either. You really, really, need a Realtor to run a CMA on the property.
Another area of consideration: It's the original sellers. The property probably is paid off or close to it. I'm guessing they're retiring, probably moving south or west. So, while they don't have a huge mortgage to pay every month, they probably want out, and pretty quickly. So they're probably motivated. The weather's turned colder, and the market usually slows down until at least January. So they're probably looking at a couple of months, at least, of the house not selling. And if it's priced $250,000 above the comps (roughly), then it's not likely to sell any time soon.
Problem is, they may accepted the idea that their home is worth around $900,000. So they may not be mentally prepared to accept a more realistic offer.
And if it's the house on Brimstone, I know the area well. My office is on Burke Centre Parkway. My cousin lives right across 123 from the development. One of my son's best friends lives on Chapel Road about half a mile from that house. And--with the disclaimer that I haven't been in that particular house--I repeat: You really need a CMA in order not to make an offer that, while below the listing price, might still be too high.
So, get a CMA. Then make an offer.
Long & Foster Realtors