I bought the OULUOQI silver link band for $70. It had good reviews in the 3rd party band thread. For the price, I love it. No gaps around the watch and the band itself seems pretty tight. I am having an issue with the clasp. It's difficult unlatch one side of it. I emailed support and they are sending me a new clasp from China. That's one thing I read in the reviews. If someone posted an issue, they responded quickly and resolved the issue. Then, the reviewer would correct their rating.
I've read in this forum where some people post a band as being 3rd,4th,5th generation. They say it's listed as part of the description. OULUOQI doesn't seem to post a generational description. I was a little perplexed by the price differences as well and wonder if the higher priced ones are either newer generations or just an attempt to sell at a higher price to those who don't look.
A co-worker has the black stainless steel bracelet I believe he bought from OULUOQI. He's had it since December and has no complaints. Support from OULUOQI seems to be good, may be worth giving it a shot!