There are several web sites that list thousands of domain names for sale. You can search on their list and see the prices. If you Google on domain names for sale, you will find them.
I just recently saw one of the top websites in my area get snapped up by some scumbag. The poor guy that owned the website had obviously invested a fortune in SEO/ or invested a tonne of time building up his website.
The name of the guy was Christian. I don't know if he went out of business or not. I would assume with the traffic he was getting that he didn't. Anyway, someone started a "Christian" website using his name. It doesn't show up well under real estate anymore. I just thought that was a really crappy thing to do. If there is a god, this dude is going to get pimp slapped when he goes to those pearly gates.