Hey @SunPro Welcome to NamePros. Read a lot here before buying anything. Most of the domainer's carrier finish before they start because they didn't put much time in researching and second biggest mistake is buying number of domains at once in the beginning. So, go slow and sell the existing names before investing huge.
Welcome to Namepros
Read.. Read... Read.... as much as you can on Namepros...
Observe.. Observe.... Observe.... Everyone's activity of Buying/Selling at various platform including Namepros.
You are more than welcome to discuss anything with me. You can PM (Private Message) me. I will share what I have learned so far in my little journey. We will learn something from each other.