This is called a Domain Drop Catching service aka domain sniping, there are quite a few sites that offer this service.<p><a href="https://en.wikipedia.org/wiki/Domain_drop_catching" rel="nofollow">https://en.wikipedia.org/wiki/Domain_drop_catching</a><p>It's a tough area because many service also register domains as soon as they're expired and available, and immediately put it up for auction.