Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Dewalt stapler stopped working

We bought this dewalt stapler about 2 months ago, it was new in it's original box. It worked great and replaced our 20 year old stapler that had begun to leak air. We used it about 6 times and it stopped working. We took it to a shop that specializes in Dewalt tools and the guy said that it is new 4 years ago. meaning it sat on a shelf for 4 years before we bought it. In that amount of time all the oil seals in the staple gun dried out and have to be replaced. Before purchasing a staple gun I would ask the age of the item