I'm going to say that I think it depends on your comfort level for the amount of money you are investing.
As I understand it, as part of the sales process, the closing/title company will perform a title search, to make sure that the title isn't clouded. Now, it is possible for that search to miss something - so you could end up closing and then later find out that there is some issue with the real estate interest you bought which would potentially keep you from using that real estate interest - this is what (as I understand it) title insurance protects you from - or at least will compensate you for.
Now, in the case of a $7,000 dollar purchase (or so), the question really becomes: are you willing to throw away $7,000 in the unlikely case that something happens?
Now, if we're talking about a $200,000 investment in a house - yes, $300 for title insurance is worth it for the peace of mind. I cannot afford to just walk away from $200,000. A $7,000 loss, while somewhat painful would not be the end of the world, and there may still be legal action I could take to recoup my investment even without title insurance.
I'm pretty certain that we did not purchase title insurance with our resale, but we were made aware that it is available (they have to tell you about it).