Welcome. You're best bet is the "How to find potential end users" thread that is at the top of this page, and a lot of reading in the appraisal section. Then you may want to look at results of past auctions - you can find some, for example, by going to moniker.com and following links to past auction results.
Yes, people make good money, but ONLY after they learn what is valuable and usually only if they buy low and sell high, as opposed to just registering currently untaken names and thinking that someone will pay a premium for them. It takes some time to learn - don't rush in. Keep in mind that there are TONS more domains for sale than there are buyers (go to Sedo.com and search domains for sale around a particular keyword and you'll see).
Also, go to the for sale threads here at NPs and notice first how many names DO NOT sell, and then look to see which ones actually do.