i thought nicekicks was a legit website?
You have to be careful with websites, a lot of the same people selling fakes on eBay also run sneaker sites. They know how to play their game. Pics of authentic shoes, usually at great prices.
If a site has a policies page, read it. It will usually say the shoes they sell are not authentic in some way. If they don't have a policies page, don't buy from them.
Things to look for-
Pictures- Stolen from legit sites or manufacturers sites
Rare shoes in sizes 7-13
Statements like "larger sizes run small"
Shipping time is more than a week
Colorways not available to the public (ie Kobe Jordans)
Sellers in one place, shoes in another