How to build a domain name portfolio of registered domain names?

[Davonny]

I have registered about 7 domain names most of which have relatively nothing in common. Someone recently sent me an email stating they would love to see my portfolio if I have one. As I stated I have a measely 7, from the looks of it a portfolio is generally constituted at atleast 50 registered names. I was wondering how a general domain portfolio is built. Do the domain names need to be categorized and sorted or is it fine for them to be all over the place figuratively speaking. And also do people really buy domain names for 100's of thousands of dollars like the site Sedo claims to have done. Also give me some ideas for the websites below that I want to develop.
http://safenaturalproducts.com
http://rerepublic.com
http://vedicmatch.com
And,
http://vonepages.com

[Jake]

Don't over think it, just give him the list of your domain names.

[tony5]

Here is Your portfolio:
http://safenaturalproducts.com
http://rerepublic.com
http://vedicmatch.com
And,
http://vonepages.com