Console aside, there are strikes against this that put downward pressure on the comp price-
Westbury schools rank low on a list of LI schools. At 7K the taxes are "low" for a reason
Last house on a dead end street in Westbury. Just a guess, but is it the LIRailroad or Northern State Parkway as a neighbor?
Owner selling, best offer. If you have not been house-hunting already you will not be in a position to accurately price the house, and neither is the owner. There is always a huge divide with most owner listings. You need to have some searching behind you before you get a feel for the areas. Find a broker you like and see some other places.
When you are house-hunting you have to resist the urge to "fall in love" with a place because love is blind. I have gone through it twice on LI where there are some funky hidden places and the second time we had a list of our agreed priorities in a property and put it in our faces whenever we wavered on something cool. Like the 1790 house in Huntington with the family graveyard in the back. Totally charming but no closets. Or a studio-house in Westbury that has two AC units both for the studio and none for the house.
Mike