How do you know this information about the current and past owners? Title insurance is always a good idea. There is a reason banks insist on it and, frankly, as a realtor I wouldn't let one of my clients buy a house without it under any circumstances. Title insurance not only codifies the chain of ownership, making sure each owner in the chain had clear title and the right to convey that title to the next owner, it also will identify any other liens on the property. Liens, unless satisfied, follow the property and not the owner, so if all liens are not satisfied or lifted prior to the sale, you could end up being responsible for someone else's debt. Get the title insurance. The cost is really very small in comparison to the peace of mind it provides.