There is no reason why in our modern age of Technologies and innovations that we should not be able to make a great sounding microphone at an affordable Price.
However, more often than not, the promise is usually greater than the delivery. Time and time again I have been let down by advertised claims. That is not to say, that a good recording can not be made with these kinds of mics. They usually can.
Most of these mics are made using generic parts. In other words, they buy parts from Asia and then assemble. As an example it looks like the Body is identical to the Roswell Mink K47. At least this company is using a Japanese milar. And there Youtube demo does sound nice. So who knows.
My suggestion would be to purchase a Used Audio Technica 4050. You can find them easily for $350 to $400 in great condition. This is a Japanese made microphone using (what I believe) is their own capsules made in their own factories.
I have a pair of 4050's and they are very nice. Our own highly respected AFG member, Doug Young, uses a stereo version of this mic and has made multiple beautiful sounding recordings. And Stephen Wake, who use to visit the AGF, makes wonderful music using a pair of these 4050's as well.
Take in mind, regardless of mics, there are other things to consider. A mic is only part of the recording battle. Your room acoustics, interface, and ultimately your performance make up a large part of the final result. With that being said, the AT4050 is a solid performer and offers Cardiod, omni and figure 8. It think you would be very happy with one.
https://www.youtube.com/watch?v=rLm7O2hIYIo
https://www.youtube.com/watch?v=70uGkbNw3wY