Is Taobao the only way to get these? That would probably be the reason these are "overlooked". I know some people are willing to go through the work and wait the time, but it stops a lot more. Plus it means the actual price probably won't be $60USD since most would have to use an agent to order it and other fees. Even Aliexpress is simpler, and probably a better reputation.
Also I don't think many reviews are out. 4.0 SHOULD have less issues (if people have devices that support it, or know if it does), but many have gotten crappy bluetooth products before so don't want to jump in.