I have a pair of cheap (£30), Chinese Bose knock-offs. In terms of performance they're pretty much indistinguishable from a pair of genuine Bose I tried, but to my tastes not quite as good as a pair of recent Sonys. I strongly suspect that they're almost identical internally to Bose.
Mine are unbranded, but search for "JH-ANC804" and you'll find them.
I have an Anker Soundcore over-ears set that works pretty well, maybe not as good as other sets that cost three times as much, but for the money I'm very happy (they also sound good). They were some 90 euros.
I’m quite happy with my Anker noise cancelling headphones. They were ~$50.
I haven’t tried the Bose ones that are the consensus best, but somehow I doubt they’re 6x better.
I've asked this many times, but I don't think it's possible due to patents owned by Bose & Apple.