They have all sorts of nike products at many price points. I have gotten nike off of amazon, and have loved each item. I also get great nike products off of 6pm.com. I would check both of them out and see what goodies you can find.
Yes Amazon sells NIke. Check it out just click the link. https://www.amazon.com/s/ref=nb_sb_ss_c_1_4?url=search-alias%3Daps&field-keywords=nike&sprefix=nike%2Caps%2C189
Yes Amazon sells all sorts of Nike brands and at a cheaper price too
Amazon sells Nike but you may want to consider New Balance instead. I worked for a podiatrist for years and he swore by New Balance as the best athletic shoe for your feet.