You saw a great deal and you bought it. The deal was great, but the sneakers may not be great for you. There are several factors that go into finding the perfect running shoes.
First – what is your arch type: low arch/flat feet, average arch, or high arch? You can outline your feet on a sheet of paper to find your arch type and compare it to a diagram online.
Second – what type of support does the shoe provide: neutral, stability, or motion control? Your arch type will determine the type of support you need. If the shoe does not provide the support you need, then you will likely experience pain or discomfort in the short or long term.
Third – how much weight can the shoe manage? Extra cushioning or support may be necessary depending on your weight.
Fourth – how many miles do you intend to average per day or week? If you plan to do some serious running, then you need to consider the quality of the sneaker not just the price.
Advice – do not play tennis or do aerobic exercises in running shoes. They were designed to support your feet while running which is a forward motion. Tennis and aerobic activity generally contain abrupt twists and turns that tennis, cross fit, and gym shoes were designed to handle.