I’ve definitely got a few things at Microcenter that were obvious repackages. I bought a cpu once to find the pins covered in thermal paste. Clearly someone made a bad choice and just returned it. I believe for the most part their returned items are sold at a discount after a review but people repackage things well and some get away with returning something as unopened. If I’m spending 150 or more I just open in store to just in case I find something odd I can return it and they never question it because I never left.