Fast delivery and low shipping rate in EUROPE
This is by far the cheapest website in Europe for pen modding, their company is located in Poland, I ordered a Flying Panda mod to Portugal, paid about 3€ for shipping and got it in 2 weeks.
Build quality could be better but not something you can't fix yourself. They didn't use any masking tape at all, so the caps came off rather quickly, you'll probably have to fix them yourself (though it's a super easy fix).
Also I got a black and white mod but the connector they used is orange, which annoys me a little bit but that has more to do with my OCD than anything else, it really isn't noticeable at all.

