First rule about Stihl, NEVER buy the products at Home Depot.
those are too cheaply made.
That advice applies to a lot of products. A big-box store is all about turning inventory and hitting a price point. Many manufacturers will put their cheapest made products in those stores for that reason.
You are better off finding a family operated hardware store local to your area - one that also does repairs. They have access to the top of the line models and back them up with service. You will pay a little more but you will find that the products will last you many years and that the store will often go out of its way to help you out if you are a regular customer.