I use to shop at a number of big-box retail stores and was afraid to buy second hand, especially electronics. I rarely shop at the big box retailers anymore and buy most all of my goods here. It turns out their staff is highly trained on testing equipment and the return policy gives me plenty of time to verify if it's what I needed. Everything I buy works and it works well. They've bent over backward for me at times. I definitely owe them my business.
I've sent others here as well, they've all come back really happy.
This is the most friendly pawn shop I've been to. You really owe it to yourself to check here for anything you need first.