Are you talking to your own agent, or the listing agent? If it's the listing agent for that house, you need to be diplomatic about it. It might be better to say "I noticed that other properties in the area with finished basements are selling for closer to _____, is there something that is making the price of this home higher that we're not aware of?" or something like that.
We saw plenty of houses like that when we were looking. Did you factor in upgrades/big ticket things (new roof, windows, etc ?). A lot of times it just means that the seller told their agent they want to list at $x and could indicate that they're unreasonable.
You could always offer what you think the house is worth and see what happens.