JVC HA-FDX1 IEM for $200 USD
You can only see the price if you are logged in. It used to be $250 USD when I bought it, but it has now been lowered to $200 USD.
All I can say is that it is an absolute treat. This is a modified version of a JVC IEM based on the head-fi community and exclusive to Drop.
The sound is delightful and the bass punchy. I think I even prefer it to my DUNU DK-3001 Pro which costs twice as much. There are a lot of reviews of people for whom this has become their favorite IEM even though they have very expensive pairs. It is a single driver model.
The nozzle is larger than usual on this model compared to other IEMs, but I've had no problems to change the tips with standard sized ones. I use SpinFit and they fit great.
If you want cristal-clear, pleasing sound from a quality, well-built pair that will be a joy to use for years and years, at an affordable price for high end, look no further.