i got lucky cause one of the domain is the name of a movie. i've got 3k for that domain (that was around 2004 though, now those movie companies will pay you a C&D letter instead),
i dropped 95% of the domain cause they are all crap. At the end i earn around $1000. a few name sold for mid xxx and the other for low xx.
However, it is just painful to sell domain for like 20 dollar (too much work and you have to deal with some scammer that do pp charge back)If you are new i suggest you go to dnforum or other domain forum to see what kind of name are being sold. I though i registered some really good name, but i though wrong