I think it is great to shop at Target & Walmart for winter clothing that will be used for cold weather cycling. I do it. But keep in mind because it is often made with lower quality materials it will wear out faster then the more expensive stuff you find online, etc. Despite the fact it does a good job of keeping moisture wicked away from your body, etc.
The only time I ride in cold weather is if it is a ride I paid to participate in or I am riding as a volunteer for/in something. This year that total was 3 times. So for me at least it is no big deal to buy cheaper cold weather riding clothing at a Target or Walmart.
But if you do a lot of riding in cold weather you may want to spend a little more at a better store for higher quality clothing. Because in the long run you'll find it would have been cheaper to do so after you start replacing the cheap clothing bought at a discount store over & over again with more cheap clothing.